NUT STARTING CRANK ASSEMBLY
1″-16 UNF tap – suitable for chasing or repairing the fine right-hand thread (1 inch – 16 TPI) on the front of the crankshaft of Willys MB / Ford GPW.
Starting Crank Crankshaft Nut
With cross pin for hand crank
Special crankshaft nut that receives the hand starting crank for manual engine starting. This nut features a cross pin allowing the starting handle to engage the crankshaft. Essential component for correct restoration of jeeps with original hand crank system.
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Material Steel |
Finish Passivated |
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Application L-134 and F-134 engine |
Part number 387633 |
Features
- Original design with cross pin for hand crank engagement
- Secures the crankshaft pulley and enables hand cranking
- Dimension 1 3/8" (35 mm)
- Requires hole in front bumper for hand crank access
- Suitable for L-134 flathead and F-134 overhead valve engines
★ Correct reproduction to original specifications for authentic restoration.
Application
Fits Willys MB (1941-1945), Ford GPW (1941-1945), Hotchkiss M201, Willys CJ-2A (1945-1949), CJ-3A (1949-1953), CJ-3B (1953-1964), and M38 (1950-1952) with 4-134 engine. Also suitable for Willys Truck and Station Wagon (1946-1953) with this engine variant.
Installation notes
The nut secures the crankshaft pulley to the front of the crankshaft. The cross pin must be positioned horizontally to correctly receive the hand crank. Use of the hand crank requires a pass-through hole in the front bumper. Apply torque according to factory specifications.
Compatibility
Two different versions exist: this version with cross pin for hand crank use (387633) and a standard nut without cross pin. Both fit the same engines, but only this version enables manual starting with the hand crank. Suitable for both chain-driven (early MB/GPW) and gear-driven (late models) camshaft variants of the 4-134 engine.
Historical context
The hand crank was standard equipment on all WWII jeeps as backup for the electric starter. On MB and GPW it was stored on the inside of the rear body panel, on later civilian models in the tool box beneath the passenger seat.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
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This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
ALL_CATEGORIES : LOWER ENGINE CJ2A, CRANKSHAFT CJ3A, LOWER ENGINE M38, CRANKSHAFT - M38, Engine complete, CRANKSHAFT CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Ford GPW | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 | 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966 |
| Willys M38A1 | 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 |
| CJ series | |
| Jeep CJ-2A | 1945, 1946, 1947, 1948, 1949 |
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
