Aftermarket Cross-References
Cross-references are a paid feature. Upgrade to see them.
Also search on
Search by OEM number. Results may include new, used, and aftermarket parts.
Supersession History
Part Details
- OEM Number
- 732 615 M1
- Part Name
- Insert, Main Bearing, Front, Bottom (-.010 in, DI Diesel)
- Qty per Tractor
- 1
- System
- engine
- Notes
- AD4.203 DI front main bottom, -0.010 inch undersize. Perkins No. 31122312. Source: MF 65 Parts Book Manual page 107 (manual_id=13). needs_verification=true (OCR not image-verified for this page).
See something wrong? Help us improve this data.
Related
Specs & Torques
Factory specs for the engine on the MF 65from a service manual covering this part's assembly.
| Fastener / Measurement | Value |
|---|---|
Perkins A4.203 IDI: Bore 4A-203 / A4.203 indirect-injection diesel. 4 cyl OHV, 1-3-4-2 firing order. | 3.6–3.6 inch |
Perkins A4.203 IDI: Stroke | 5–5 inch |
Perkins A4.203 IDI: Piston displacement | 203.5–203.5 ci |
Perkins A4.203 IDI: Compression ratio Indirect-injection variant. AD4.203 DI is lower (~16:1). | 17.4–17.4 ratio |
Perkins A4.203 IDI: Compression pressure (200-250 RPM cranking) All injectors removed, fuel control in shut-off, engine at operating temperature. Minimum acceptable: 390 psi. | 440–460 psi |
Perkins A4.203 IDI: Engine low idle PTO speed at low idle: 180-198 RPM | 500–550 rpm |
Perkins A4.203 IDI: Engine rated speed PTO speed at rated: 720-738 RPM | 2000–2050 rpm |
Perkins A4.203 IDI: Engine high idle (no-load) PTO speed at high idle: 756-774 RPM | 2100–2150 rpm |
Perkins A4.203 IDI: Maximum engine torque Occurs at ~1350 RPM | 151–151 ft-lbs |
Perkins A4.203 IDI: Top piston skirt diameter Measured at right angles from piston pin | 3.5936–3.5946 inch |
Perkins A4.203 IDI: Bottom piston skirt diameter Measured at right angles from piston pin | 3.5955–3.5965 inch |
Perkins A4.203 IDI: Piston pin bore diameter | 1.2495–1.25 inch |
Service Procedures
R&R and adjustment procedures for the engine on the MF 65.
Source: MF 65 Workshop Service Manual (manual id=12). Viscosity: SAE 30 above 90°F, SAE 20 or 20W from 32-90°F, SAE 10W from 10-32°F, SAE 5W or 5W/20 from -10 to 10°F.
Engine oil change interval: every 100 hours
Source: MF 65 Workshop Service Manual (manual id=12).
Crankcase capacity (Perkins A4.203 IDI) without filter change: 7 US qts (5.8 Imp qts)
Source: MF 65 Workshop Service Manual (manual id=12).
Crankcase capacity (Perkins A4.203 IDI) with new filter: 7.5 US qts (6.3 Imp qts)
Source: MF 65 Workshop Service Manual (manual id=12).
Oil filter change interval: every other oil change (200 hours)
Source: MF 65 Workshop Service Manual (manual id=12). Inner bearing oil cup only when motor is removed for service.
Starter motor lubrication: 8-10 drops light engine oil to outer bearing oil cup every 300 hours
Source: MF 65 Workshop Service Manual (manual id=12). Daily clean under severe dust conditions; internal filter 1-2x/year.
Air cleaner oil refill: same oil as engine crankcase, fill oil cup to mark
Get the free MF 65 Quick Reference Card
Capacities, fluid specs, filter cross-refs, torque specs — one printable page.
Fits These Tractors
In This Assembly
View full Parts Book: Crankshaft and Bearings →Reference
Related Parts
Data last verified April 2026. Sources: Massey Ferguson parts books, manufacturer catalogs, community submissions.