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Supersession History
Part Details
- OEM Number
- 184 558 M1
- Part Name
- Ring, Flywheel Ventilating
- Qty per Tractor
- 1
- Assembly
- Parts Book: Clutch (Dual)
- System
- drivetrain
- Notes
- Flywheel ventilating ring (clutch). Source: MF 65 Parts Book Manual page 289. needs_verification=true.
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Related
Specs & Torques
Factory specs for the drivetrain on the MF 65from a service manual covering this part's assembly.
| Fastener / Measurement | Value |
|---|---|
Clutch: Mounting bolts torque (cover to flywheel) MF 65 Combination Coil and Belleville Spring Dual Clutch. Tighten clutch cover to ventilated flywheel after inserting clutch pilot tool through 9-in. and 11-in. discs. | 28–33 ft-lbs |
Clutch: Coil spring color (MF 65) Lavender. | 0–0 reference |
Clutch: Coil spring number of total coils (MF 65) | 10–10 count |
Clutch: Coil spring number of active coils (MF 65) 8-7/64 active coils. | 8.109375–8.109375 count |
Clutch: Coil spring free length (MF 65) 2-21/64 inch. | 2.328125–2.328125 inch |
Clutch: Coil spring length in use minimum (MF 65) 1-11/32 inch minimum. | 1.34375–1.34375 inch |
Clutch: Coil spring solid height maximum (MF 65) 1-9/32 inch maximum. | 1.28125–1.28125 inch |
Clutch: Coil spring test length (MF 65) 1-1/2 inch. | 1.5–1.5 inch |
Clutch: Coil spring test load (MF 65) Test load at 1-1/2 inch test length. | 111–123 lbs |
Clutch: Belleville spring color mark (MF 65) Blue. | 0–0 reference |
Transmission: Oil capacity (combined trans + diff + hydraulic) 8 US gal (6.5 Imp gal). Hydraulic system shares oil with transmission and differential. | 8–8 us-gallons |
Transmission: Oil viscosity (above 50°F) SAE 90 mineral oil. | 0–0 reference |
Service Procedures
R&R and adjustment procedures for the drivetrain on the MF 65.
Source: MF 65 Workshop Service Manual (manual id=12). If external hydraulic system requirements exceed 1.5 gallons, add additional oil; drain when external hydraulic system is disconnected.
MF 65 transmission/differential/hydraulic shared oil capacity: 8 US gallons (6-1/2 Imperial gallons). Same oil lubricates all three systems. Use SAE 90 for ambient temperatures above 50°F, SAE 80 for temperatures below 50°F. Multi-Power transmission install spec is SAE 80 mineral oil throughout.
Source: MF 65 Workshop Service Manual (manual id=12). Preload spec: 0.001 to 0.005 inch.
MF 65 rear axle preload adjustment: install rear axle preload tool (manual Fig. 1). With torque wrench on center nut, it should require 5 to 10 ft-lbs indicated torque to turn the axle. If less, add shims; if more, remove shims. To determine shim count: attach dial indicator to axle housing (point against face of wheel axle), use two screwdrivers 180° apart to check end-play, then add shims equal to total end-play indicated plus 0.005 inch. Axle housing nuts torque to 50 ft-lbs.
Source: MF 65 Workshop Service Manual (manual id=12). On tractors with differential lock, right-hand differential case adaptor is replaced by a differential coupling cap with dog coupling. At transmission serial number SNY51686, change made in differential lock pedal housing — refer to serial number when ordering parts.
MF 65 differential side gear backlash check: use dial indicator between side gears and pinion. Recommended backlash 0.003 to 0.011 inch and is NONADJUSTABLE. Excessive backlash indicates worn differential pinion and side gear thrust washers — replace washers. Right-hand differential case bolts torque to 47-53 ft-lbs and lock with wire after tightening.
Source: MF 65 Workshop Service Manual (manual id=12). Refer to transmission serial number whenever replacing pinion bearing cups, pinion bearing cup housing, and tapered bearings.
MF 65 pinion bearing preload check: with assembly mounted, tighten lock nut securely. Back off lock nut and draw up until torque loading of 18-22 in-lbs is required to turn the shaft (this is NOT torque on the nut, but torque required to turn shaft after locknut tightened). With spring scale attached 3 inches from center of pinion shaft, requires 6 to 7-1/4 lbs pull to equal 18-22 in-lbs torque.
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Data last verified April 2026. Sources: Massey Ferguson parts books, manufacturer catalogs, community submissions.