{"product_id":"pro-3-motor-assembly-parts-by-northrock","title":"PRO 3+ Vibrator Motor Assembly Parts","description":"\u003cp\u003e\u003cstrong\u003eShop genuine OEM parts for the Northrock PRO 3+ (25L3 \/ 25L3QD) 3 HP electric concrete vibrator motor.\u003c\/strong\u003e Click any numbered callout on the diagram below to jump to the exact part. Part numbers match the official Northrock service manual.\u003c\/p\u003e\n\n\u003cp\u003eDanseUSA is an authorized Northrock dealer. Orders placed before 12 PM ET ship same business day when in stock. Not sure which part? Email \u003ca href=\"mailto:customerservice@danseusa.com\"\u003ecustomerservice@danseusa.com\u003c\/a\u003e with your motor's model and serial number.\u003c\/p\u003e\n\n\u003ch2\u003eAbout the PRO 3+ (25L3 \/ 25L3QD)\u003c\/h2\u003e\n\u003cp\u003eThe Northrock PRO 3+ is a 3 HP, 115V, 19 A electric concrete consolidator motor built for the \u003cstrong\u003ebusy contractor and tough rental applications\u003c\/strong\u003e. It drives vibrator heads up to \u003cstrong\u003e2-1\/2\" diameter\u003c\/strong\u003e and is the correct motor for \u003cstrong\u003ecolumn vibration, slab consolidation, footings and forms, structural walls, precast production, and low-slump mixes\u003c\/strong\u003e. The \u003cstrong\u003e25L3\u003c\/strong\u003e is the standard model; the \u003cstrong\u003e25L3QD\u003c\/strong\u003e adds a quick-disconnect coupling for fast shaft swaps — ideal for rental fleets and multi-head jobs.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHigh-strength cast aluminum housing dissipates heat during continuous-duty operation\u003c\/li\u003e\n  \u003cli\u003eShock-absorbing frame doubles as a carry handle and protects the switch from impact\u003c\/li\u003e\n  \u003cli\u003eWatertight, strain-relief power cord with frame-protected switch\u003c\/li\u003e\n  \u003cli\u003eCompatible with Northrock flex shafts (2, 5, 7, 10, 12, 14, 16, 21 ft) and all seven Northrock head sizes (3\/4\" through 2-1\/2\")\u003c\/li\u003e\n  \u003cli\u003eHeads are factory-sealed, oil-bath lubricated with four lifetime ball bearings, permanent seal, and alloy steel housing — maintenance-free\u003c\/li\u003e\n  \u003cli\u003eInterchangeable with shafts and heads from Wacker, Wyco, Oztec, Stow, Stone, Multiquip, Mikasa, and more (with correct adapter)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use the Diagram\u003c\/h2\u003e\n\u003cp\u003eMatch the Ref # on the exploded view to the row in the parts list. Click the callout → product page → add to cart. Always replace wear parts (brushes, bearings, seals) in pairs.\u003c\/p\u003e\n\n\u003ch2\u003eMost Commonly Replaced Parts on the PRO 3+ (25L3)\u003c\/h2\u003e\n\u003cp\u003eAbout 80% of PRO 3+ service issues come down to these six parts. The PRO 3+ runs at higher amp draw than the PRO 1.5+ and PRO 2+, so brushes and bearings wear faster under continuous-duty loads — diagnose in this order before replacing anything larger:\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eRef #\u003c\/th\u003e\n\u003cth\u003ePart\u003c\/th\u003e\n\u003cth\u003eP\/N\u003c\/th\u003e\n\u003cth\u003eTypical Life\u003c\/th\u003e\n\u003cth\u003eSymptom\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003ctd\u003eCarbon Brush (pair)\u003c\/td\u003e\n\u003ctd\u003e490A1\u003c\/td\u003e\n\u003ctd\u003e150–350 hrs\u003c\/td\u003e\n\u003ctd\u003eWeak under load, heavy sparking, burn smell\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003ctd\u003eAir Filter\u003c\/td\u003e\n\u003ctd\u003e470B1\u003c\/td\u003e\n\u003ctd\u003e40 hrs\u003c\/td\u003e\n\u003ctd\u003eMotor runs hot, thermal cutout\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003eBall Bearing (pair)\u003c\/td\u003e\n\u003ctd\u003e140C300\u003c\/td\u003e\n\u003ctd\u003e400–1,200 hrs\u003c\/td\u003e\n\u003ctd\u003eGrinding, squealing, shaft wobble\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003ePower Cord\u003c\/td\u003e\n\u003ctd\u003e505J1\u003c\/td\u003e\n\u003ctd\u003eAs needed\u003c\/td\u003e\n\u003ctd\u003eNicks, cracked strain relief, bad plug\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003eElectric Switch\u003c\/td\u003e\n\u003ctd\u003e425B1\u003c\/td\u003e\n\u003ctd\u003eAs needed\u003c\/td\u003e\n\u003ctd\u003eMushy, sticks, won't toggle cleanly\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003eSwitch Seal\u003c\/td\u003e\n\u003ctd\u003e430A1\u003c\/td\u003e\n\u003ctd\u003eReplace with switch\u003c\/td\u003e\n\u003ctd\u003eWater intrusion, visible wear\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePRO 3+ (25L3) Full Parts List\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eRef #\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eQty\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003ctd\u003e190F150\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eEnd Cap\u003c\/td\u003e\n\u003ctd\u003e215M1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eBolt\u003c\/td\u003e\n\u003ctd\u003e280A225\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003eLock Washer\u003c\/td\u003e\n\u003ctd\u003e285A250\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eEnd Bell (3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e420D1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eBaffle Filter (End Bell Side, 3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e470F1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003eSpring Washer\u003c\/td\u003e\n\u003ctd\u003e380A1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003eBall Bearing\u003c\/td\u003e\n\u003ctd\u003e140C300\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003eArmature (3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e475C1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003ctd\u003e190E140\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003eLock Washer\u003c\/td\u003e\n\u003ctd\u003e285A187\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003eField Coil (3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e480C1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003eCommutator Service Port Cap\u003c\/td\u003e\n\u003ctd\u003e400B1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003eMotor Housing (3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e105AG1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003eBolt\u003c\/td\u003e\n\u003ctd\u003e280A312\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003eLock Washer\u003c\/td\u003e\n\u003ctd\u003e285A312\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003ctd\u003eWasher\u003c\/td\u003e\n\u003ctd\u003e370A312\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003eFrame Assembly (3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e440D1\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003eGrounded Power Cord (heavy gauge)\u003c\/td\u003e\n\u003ctd\u003e505J1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003eBrush Holder\u003c\/td\u003e\n\u003ctd\u003e495A1\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003ctd\u003eCarbon Brush\u003c\/td\u003e\n\u003ctd\u003e490A1\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003eBrush Cap\u003c\/td\u003e\n\u003ctd\u003e500A1\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e23\u003c\/td\u003e\n\u003ctd\u003eOuter Protective Brush Cap\u003c\/td\u003e\n\u003ctd\u003e400C1\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003eCord Mounting Plate\u003c\/td\u003e\n\u003ctd\u003e215CC1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003ctd\u003e190F875\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003eSet Screw\u003c\/td\u003e\n\u003ctd\u003e190B125\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e27\u003c\/td\u003e\n\u003ctd\u003eWire Clip\u003c\/td\u003e\n\u003ctd\u003e467C1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003eElectric Switch\u003c\/td\u003e\n\u003ctd\u003e425B1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003ctd\u003eSwitch Mounting Plate\u003c\/td\u003e\n\u003ctd\u003e215CB1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003ctd\u003e190F850\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003eWater-Resistant Switch Seal\u003c\/td\u003e\n\u003ctd\u003e430A1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003ctd\u003eAir Filter (3 HP specific, larger)\u003c\/td\u003e\n\u003ctd\u003e470B1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e33\u003c\/td\u003e\n\u003ctd\u003eAir Filter Cover (3 HP specific)\u003c\/td\u003e\n\u003ctd\u003e215X1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003eCore Adapter\u003c\/td\u003e\n\u003ctd\u003eSee compatibility chart\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003eCasing Adapter\u003c\/td\u003e\n\u003ctd\u003eSee compatibility chart\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eRepair Tips\u003c\/h2\u003e\n\n\u003ch3\u003eBrush replacement (Ref #21, P\/N 490A1)\u003c\/h3\u003e\n\u003cp\u003eUnplug cord. Remove outer brush cap (400C1) and brush cap (500A1). Pull old brush. If carbon is under 1\/4\" or cracked, replace \u003cstrong\u003eboth brushes as a pair\u003c\/strong\u003e. Check commutator for glazing — light glaze is OK, grooves or pits mean the armature needs service. The PRO 3+ wears brushes faster than the smaller motors due to higher amp draw; check every 150 hours on continuous-duty applications. Reinstall caps finger-tight plus 1\/8 turn.\u003c\/p\u003e\n\n\u003ch3\u003eBearing replacement (Ref #8, P\/N 140C300)\u003c\/h3\u003e\n\u003cp\u003eTwo sealed bearings, one each end of the armature. Always replace as a pair. Before running the motor again, pull the flex shaft core and check lubrication — a dry core cooks new bearings within 50 hours, and the PRO 3+ is often run with long 21 ft or connected shafts that consume more driveline power. Apply a 1\/16\" coat of lithium grease to the core; do not over-grease.\u003c\/p\u003e\n\n\u003ch3\u003eModel-specific parts — do not cross-swap\u003c\/h3\u003e\n\u003cp\u003eThe PRO 3+ has \u003cstrong\u003emore unique parts than the 1.5+ or 2+\u003c\/strong\u003e. The armature (475C1), field coil (480C1), end bell (420D1), motor housing (105AG1), frame assembly (440D1), baffle filter (470F1), air filter (470B1), air filter cover (215X1), power cord (505J1), and screw 190E140 are all 3 HP specific. The PRO 1.5+ uses 475B1 \/ 480B1 and the PRO 2+ uses 475A1 \/ 480A1. Verify every part number against your motor before ordering — a 2 HP armature will not fit a 3 HP motor.\u003c\/p\u003e\n\n\u003ch3\u003ePower cord replacement (Ref #19, P\/N 505J1)\u003c\/h3\u003e\n\u003cp\u003eDo not tape damaged cords. Replace any cord with nicks, cracked strain relief, or plug damage. The 505J1 is the heavier-gauge cord required for the PRO 3+ and carries a 20A plug. Do not substitute the lighter 505H1 cord from the PRO 1.5+ or PRO 2+ — it will overheat under the 19A load.\u003c\/p\u003e\n\n\u003ch3\u003eSwitch + seal (Ref #28, #31)\u003c\/h3\u003e\n\u003cp\u003eAlways replace the switch (425B1) and the water-resistant seal (430A1) together. A compromised seal lets water into the switch cavity and shorts the motor.\u003c\/p\u003e\n\n\u003ch3\u003eAir filter service (Ref #32, P\/N 470B1)\u003c\/h3\u003e\n\u003cp\u003eInspect every 40 hours. Replace when gray with embedded concrete dust. Never run the motor without the filter installed. The PRO 3+ uses a \u003cstrong\u003elarger filter (470B1)\u003c\/strong\u003e than the PRO 1.5+ and PRO 2+ (470A1) because the 3 HP motor needs more cooling airflow for continuous-duty operation. Do not substitute the smaller 470A1.\u003c\/p\u003e\n\n\u003ch2\u003eMaintenance Schedule\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEvery shift:\u003c\/strong\u003e Inspect cord, plug, switch, housing. Clean concrete dust off exterior.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEvery 40 hrs:\u003c\/strong\u003e Clean or replace air filter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEvery 50 hrs:\u003c\/strong\u003e Pull flex shaft core, inspect, re-grease with lithium grease (1\/16\" coat max).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEvery 150 hrs (continuous duty) or 200 hrs (intermittent):\u003c\/strong\u003e Check brush length through service port. Replace pair if worn.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEvery 500 hrs:\u003c\/strong\u003e Inspect commutator for glazing or grooving.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnnually (heavy use):\u003c\/strong\u003e Replace ball bearings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eElectrical Requirements (19 A draw)\u003c\/h2\u003e\n\n\u003cp class=\"warning\"\u003e\u003cstrong\u003eThe PRO 3+ requires a 20A circuit with a NEMA 5-20R T-slot receptacle\u003c\/strong\u003e — it will not run on a standard 15A household outlet. If using a generator, size above 2,500 running watts with a 20A outlet.\u003c\/p\u003e\n\n\u003ch3\u003eExtension Cord Sizing\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eCord length\u003c\/th\u003e\n\u003cth\u003eMinimum AWG\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0–25 ft\u003c\/td\u003e\n\u003ctd\u003e12 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e26–50 ft\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e51–100 ft\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eOutdoor cords must be marked \u003cstrong\u003eW-A\u003c\/strong\u003e (e.g. SOW-A). 3-conductor grounded only. Use a GFCI in damp conditions. Undersized cords are the #1 cause of burned PRO 3+ motors — voltage drop at 19A forces the motor to draw even more current to maintain RPM, which cooks brushes, armature windings, and the field coil. Never run the PRO 3+ on a 14 AWG cord.\u003c\/p\u003e\n\n\u003ch2\u003eShaft \u0026amp; Head Compatibility\u003c\/h2\u003e\n\n\u003ch3\u003eHead diameter range\u003c\/h3\u003e\n\u003cp\u003eThe PRO 3+ is rated for the \u003cstrong\u003efull Northrock head range — 3\/4\" through 2-1\/2\"\u003c\/strong\u003e. \u003cstrong\u003eSeven approved head sizes: 3\/4\", 1\", 1-1\/4\", 1-1\/2\", 1-3\/4\", 2\", and 2-1\/2\"\u003c\/strong\u003e. Unlike the PRO 2+, the PRO 3+ holds rated vibration frequency (~10,000 VPM) on the largest heads under heavy load — making it the correct motor for \u003cstrong\u003elow-slump mixes, precast plants, and continuous-duty production\u003c\/strong\u003e where a 2 HP motor would bog down and overheat.\u003c\/p\u003e\n\n\u003ch3\u003eHead construction (maintenance-free)\u003c\/h3\u003e\n\u003cp\u003eNorthrock vibrator heads feature \u003cstrong\u003efour high-performance lifetime ball bearings, an oil-bath lubrication system with permanent seal\u003c\/strong\u003e, and an alloy steel housing that resists wear. The scientifically-designed eccentric maximizes amplitude while the permanent seal keeps oil in and contaminants out. \u003cstrong\u003eNo field maintenance required on heads\u003c\/strong\u003e — replace the entire head when the bearings finally fail. Heads are \u003cstrong\u003einterchangeable with all major brands on the market\u003c\/strong\u003e when paired with the correct adapter.\u003c\/p\u003e\n\n\u003ch3\u003eShaft options\u003c\/h3\u003e\n\u003cp\u003eNorthrock flexible shafts are available in \u003cstrong\u003estandard-duty\u003c\/strong\u003e (stiffer for better poking ability) and \u003cstrong\u003epencil shaft\u003c\/strong\u003e (more flexible for tight rebar-congested pours) configurations. \u003cstrong\u003eEight single lengths: 2', 5', 7', 10', 12', 14', 16', and 21'\u003c\/strong\u003e. Maximum reach up to 60 ft using a Northrock shaft connector. The PRO 3+ is the recommended motor for any job requiring connected shafts beyond 30 ft — the extra torque prevents driveline sag on long reaches.\u003c\/p\u003e\n\n\u003ch3\u003eQuick-disconnect shafts (25L3QD)\u003c\/h3\u003e\n\u003cp\u003eIf you're running the 25L3QD, use Northrock quick-disconnect compatible shafts such as the \u003cstrong\u003e25N7 (7 ft)\u003c\/strong\u003e, \u003cstrong\u003e25N14 (14 ft)\u003c\/strong\u003e, and other QD-compatible lengths. These shafts feature \u003cstrong\u003erubber-coated steel braiding\u003c\/strong\u003e to resist stretching and a \u003cstrong\u003ehardened steel inner liner\u003c\/strong\u003e as the bearing surface for the greased core. Each assembly includes both the shaft casing and a pre-greased core.\u003c\/p\u003e\n\n\u003ch3\u003eMulti-brand adapter chart\u003c\/h3\u003e\n\u003cp\u003eThe PRO 3+ countershaft is universal. With the correct \u003cstrong\u003ecore adapter\u003c\/strong\u003e (160-series) and \u003cstrong\u003ecasing adapter\u003c\/strong\u003e (150-series), it runs shafts and heads from:\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel(s)\u003c\/th\u003e\n\u003cth\u003eCore Adapter\u003c\/th\u003e\n\u003cth\u003eCasing Adapter\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNorthrock (native)\u003c\/td\u003e\n\u003ctd\u003e1.5+, 2+, 3+\u003c\/td\u003e\n\u003ctd\u003e160AH1\u003c\/td\u003e\n\u003ctd\u003e150DW1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNorthrock Q.D.\u003c\/td\u003e\n\u003ctd\u003e1.5+, 2+, 3+ QD\u003c\/td\u003e\n\u003ctd\u003e160CW1\u003c\/td\u003e\n\u003ctd\u003e150DE1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWacker Neuson\u003c\/td\u003e\n\u003ctd\u003eM1000, M2000, M3000\u003c\/td\u003e\n\u003ctd\u003e160BD2\u003c\/td\u003e\n\u003ctd\u003e150DE1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWyco\u003c\/td\u003e\n\u003ctd\u003e990, 991, 991-1\/2\u003c\/td\u003e\n\u003ctd\u003e160CT1\u003c\/td\u003e\n\u003ctd\u003e150DG1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWyco\u003c\/td\u003e\n\u003ctd\u003e902, 992\u003c\/td\u003e\n\u003ctd\u003e160BP1\u003c\/td\u003e\n\u003ctd\u003e150DG1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWyco\u003c\/td\u003e\n\u003ctd\u003e992-1\/2\u003c\/td\u003e\n\u003ctd\u003e160CT1\u003c\/td\u003e\n\u003ctd\u003e150DH1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWyco\u003c\/td\u003e\n\u003ctd\u003e903, 993\u003c\/td\u003e\n\u003ctd\u003e160BP1\u003c\/td\u003e\n\u003ctd\u003e150DH1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOztec\u003c\/td\u003e\n\u003ctd\u003e1.2, 1.8, 2.4, 3.2\u003c\/td\u003e\n\u003ctd\u003e160AH1\u003c\/td\u003e\n\u003ctd\u003e150CX1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOztec Q.D.\u003c\/td\u003e\n\u003ctd\u003e1.2, 1.8, 2.4, 3.2 QD\u003c\/td\u003e\n\u003ctd\u003e160CW1\u003c\/td\u003e\n\u003ctd\u003e150DE1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStow\u003c\/td\u003e\n\u003ctd\u003ePencil\u003c\/td\u003e\n\u003ctd\u003e160BF1\u003c\/td\u003e\n\u003ctd\u003e150DD1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStow\u003c\/td\u003e\n\u003ctd\u003eNo Q.D.\u003c\/td\u003e\n\u003ctd\u003e160BG1\u003c\/td\u003e\n\u003ctd\u003e150CY1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStow\u003c\/td\u003e\n\u003ctd\u003eWith Q.D.\u003c\/td\u003e\n\u003ctd\u003e160BD1\u003c\/td\u003e\n\u003ctd\u003e150DE1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMikasa \/ Multiquip\u003c\/td\u003e\n\u003ctd\u003ePMA-1, PMA-2, PMA-3\u003c\/td\u003e\n\u003ctd\u003e160DD1\u003c\/td\u003e\n\u003ctd\u003e150FR1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStone\u003c\/td\u003e\n\u003ctd\u003e1, 1.5, 2, 3 HP\u003c\/td\u003e\n\u003ctd\u003e160AH3\u003c\/td\u003e\n\u003ctd\u003e150DC1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaster\u003c\/td\u003e\n\u003ctd\u003eCV10, CV15, CV20\u003c\/td\u003e\n\u003ctd\u003e160AH2\u003c\/td\u003e\n\u003ctd\u003e150DB1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDynapac\u003c\/td\u003e\n\u003ctd\u003eAH15, AH25\u003c\/td\u003e\n\u003ctd\u003e160DK1\u003c\/td\u003e\n\u003ctd\u003e150FX1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eViber\u003c\/td\u003e\n\u003ctd\u003eVME\u003c\/td\u003e\n\u003ctd\u003e160AH4\u003c\/td\u003e\n\u003ctd\u003e150CW1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDenver\u003c\/td\u003e\n\u003ctd\u003eQM500, JM700\u003c\/td\u003e\n\u003ctd\u003e160BT1\u003c\/td\u003e\n\u003ctd\u003e150DJ1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDreyer\u003c\/td\u003e\n\u003ctd\u003eJE\u003c\/td\u003e\n\u003ctd\u003e160CX1\u003c\/td\u003e\n\u003ctd\u003e150FH1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRemington\u003c\/td\u003e\n\u003ctd\u003eVL\u003c\/td\u003e\n\u003ctd\u003e160CT2\u003c\/td\u003e\n\u003ctd\u003e150DF1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRemington\u003c\/td\u003e\n\u003ctd\u003e1EV, 2EV, 3EV\u003c\/td\u003e\n\u003ctd\u003e160BM1\u003c\/td\u003e\n\u003ctd\u003e150DF1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eBrand not listed? Call \u003cstrong\u003e+1 (202) 630-1027\u003c\/strong\u003e or email \u003ca href=\"mailto:customerservice@danseusa.com\"\u003ecustomerservice@danseusa.com\u003c\/a\u003e with your shaft brand, model, and head size.\u003c\/p\u003e","brand":"danse-usa","offers":[{"title":"Default Title","offer_id":47708533883106,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0728\/0204\/2082\/files\/NorthrockPro1.5MotorParts.png?v=1776545566","url":"https:\/\/www.danseusa.com\/products\/pro-3-motor-assembly-parts-by-northrock","provider":"Danse USA","version":"1.0","type":"link"}