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Supersession History
Part Details
- OEM Number
- 185 986 M1
- Part Name
- Strap, Generator Adjusting
- Qty per Tractor
- 1
- Assembly
- Parts Book: Generator
- System
- electrical
- Notes
- Generator adjusting strap. Source: MF 65 Parts Book Manual page 91. needs_verification=true.
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Related
Specs & Torques
Factory specs for the electrical on the MF 65from a service manual covering this part's assembly.
| Fastener / Measurement | Value |
|---|---|
Perkins A4.203 IDI: Battery type — 12V system Willard CW-5SH 12V lead-acid, 96 amp-hour. 6 cells, 17 plates each. Or two 6V 140 amp-hour Willard 3H-140 (3 cells, 19 plates each). | 96–96 amp-hour |
Perkins A4.203 IDI: Battery normal charging rate Bench-charger normal rate. | 8–8 amperes |
Perkins A4.203 IDI: Battery hydrometer reading (fully charged) Hydrometer reading at 80°F when fully charged. | 1.26–1.26 specific-gravity |
Perkins A4.203 IDI: Battery cranking voltage limit (10-15 sec crank) Voltage should not drop below 10V during 10-15 second crank with fuel shut-off in 'off'. | 10–10 volts |
Perkins A4.203 IDI: Battery per-cell voltage during crank Each cell should read 1.6V or higher during crank. Max 0.2V variation between cells. Below this, replace battery. | 1.6–1.6 volts |
Perkins A4.203 IDI: Battery cable resistance test (insulated side, max drop) Voltmeter from positive battery post to terminal post on starter, during crank. >0.6V = bad cable connection. | 0.6–0.6 volts |
Perkins A4.203 IDI: Battery cable resistance test (ground side, max drop) Voltmeter from negative battery clamp to starter housing, during crank. >0.6V = bad ground. | 0.6–0.6 volts |
Perkins A4.203 IDI: Solenoid switch resistance test (max drop) Voltmeter across solenoid during crank. >0.2V = bad solenoid contacts. | 0.2–0.2 volts |
Perkins A4.203 IDI: Starter switch circuit resistance (max drop) Voltmeter from S terminal of solenoid during crank. >0.55V = bad switch or supply wires. | 0.55–0.55 volts |
Perkins A4.203 IDI: Charging circuit resistance (max drop) Voltmeter test with 7-ohm resistor in circuit, generator at speed showing 10A. >0.4V = poor contact. | 0.4–0.4 volts |
Perkins A4.203 IDI: Generator output (normal operation) Ammeter reading at full throttle. | 10–12 amperes |
Perkins A4.203 IDI: Charging system voltage (normal operation) Voltmeter at battery during normal generator operation. | 14–14 volts |
Service Procedures
R&R and adjustment procedures for the electrical on the MF 65.
Source: MF 65 Workshop Service Manual (manual id=12). Continental G-176/GB-176 ignition system.
MF 65 distributor identification by serial number: SN 702826 and up (gasoline + LP-Gas) = Delco-Remy 1112644. Gasoline prior to SN 702826 = Delco-Remy 1112583. LP-Gas prior to SN 702826 = Delco-Remy 1112589. All centrifugal advance, clockwise rotation (drive end view). Point gap 0.018-0.024 inch (set 0.022). Point spring tension 19-23 oz.
Source: MF 65 Workshop Service Manual (manual id=12). Continental G-176/GB-176 cranking system.
MF 65 starter motor identification by serial number and variant: Agricultural SN 691660+ = Delco-Remy 1107226; Agricultural prior to 691660 = Delco-Remy 1107654; Utility SN 703204+ = Delco-Remy 1107329; Utility SN 691669-703203 = Delco-Remy 1107226. All clockwise rotation (drive end view), minimum brush tension 35 oz.
Source: MF 65 Workshop Service Manual (manual id=12). Continental G-176/GB-176 charging system.
MF 65 generator identification (3 Delco-Remy variants): DR-1100435 (gasoline SN 694649+ / LP-Gas SN 694699+) = 25A @ 14V at ~3040 RPM. DR-1100362 (gasoline SN 663016-694648 / LP-Gas SN -694698 / LP-Gas SN 662839-662903) = 20A @ 14V at ~2300 RPM. DR-1100998 (prior to SN 662839, also SN 662903-663015) = cold output 13-16A @ 14V at ~2600 RPM, hot output 10-12A @ 14V at ~2800 RPM. All paired with Delco-Remy 1118981 voltage regulator.
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Data last verified April 2026. Sources: Massey Ferguson parts books, manufacturer catalogs, community submissions.