Allis-Chalmers Tractor Shop Manual (1933–1958) | B, C, CA, G, RC, WC, WF, WD, WD45 & WD45D
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Allis Chalmers Models Covered & Key Technical Specifications
Models: B, C, CA, G, RC, WC, WF, WD, WD45, WD45D
Sub-models / Variants: Tricycle type (single wheel, double wheel), Axle type (non-adjustable, adjustable), Diesel (WD45D; engine 45D), LP-gas (WD45), B (BE or CE engine), C / CA (CE engine), G (Continental N62 engine), WD45 gasoline (WD45 engine), Steel rear axle housing (RC / WC; serial-number suffix S), 3-speed transmission (B, C, G), 4-speed transmission (CA, RC, WC, WF, WD, WD45; G with extra-low gear), Straight-cut transmission (WD prior to 127008), Helical-cut transmission (WD after 127007 and WD45)
Serial-number-specific versions:
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B: Rockford 9TT engine clutch up to tractor serial B7134; 9RM after B7134 to engine number 28222; 8½RM from engine number 28222 and up. Some early B tractors used Auburn Atwood clutches. BE timing-gear marking variants prior to BE12550 and BE12550 and up. Earlier brake-adjustment arrangement prior to B52714.
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WC: Earlier crankpin specification prior to 3665. Rockford 10RR engine clutch prior to WC74330; subsequent tractors use 10RM. Traction-release coupling effective WC74330. Differential construction change: earlier parts discontinued after WC-67327; replacement arrangement effective WC-67328.
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WF: Rockford 10RR engine clutch prior to 1337; subsequent tractors use 10RM. Differential construction change: earlier parts discontinued after WF-353; replacement arrangement effective WF-354.
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WD: Integral single-wheel fork and vertical spindle prior to WD25129; flange-bolted fork after WD25128. Revised PTO idler arrangement after WD2400. Final-drive spacer and retaining ring omitted after 32831.
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WD engines: Revised inlet-valve guide installation after W289000. Clutch pilot-bearing lubricating wick omitted after W253200; clutch-shaft pilot bearing omitted beginning with W310920.
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WD / WD45 engines: Rotocap exhaust-valve rotators on WD engines after 299173 and on WD engines 262650 through 263224, and on WD45 engines.
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WD clutch-shaft sealing: Original single-seal torque tube and shaft prior to 70966. New torque tube and shaft with one seal as built in ranges 70966 to 71146 and 72138 to 75645; two seals as built in range 71146 to 72138 and after 75645.
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WD45 gasoline: Bolt-attached camshaft gear prior to engine serial 45-48556; press-fit gear on later tractors. Shimmed connecting-rod bearings prior to engine serial W45FG1001; shimless bearings after W45FG1001.
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B / C hydraulic pumps: Long discharge-valve plug prior to pump serial 2585; medium plug from 2585 to 10114; short plug at pump serial A1 and up.
Model Years: 1933–1958 (1933, 1934, 1935, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958)
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Engine displacement: 230 CID (WD45 Diesel)
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Compression ratio: 15.5:1 (WD45 Diesel)
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Firing order: 1-5-3-6-2-4 (WD45 Diesel), 1-2-4-3 (B, C, CA, RC, WC, WF, WD, WD45), 1-3-4-2 (G)
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Connecting rod nut torque: 30-40 ft-lbs (WD45 Diesel)
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Cylinder head nut torque: 95-100 ft-lbs (WD45 Diesel)
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Crankcase oil capacity: 7 quarts (WD45 Diesel, with filter)
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Engine speeds: 600 RPM (Low Idle), 1975 RPM (High Idle) — WD45 Diesel
Allis Chalmers Manual Features & Selected Content Preview
This shop manual from Technical Publications, Inc., copyright 1960, covers 1933–1958 Allis-Chalmers B, C, CA, G, RC, WC, WF, WD, WD45, and WD45 Diesel tractors. Separate non-diesel and diesel engine sections accompany model-specific drivetrain, steering, brake, and power-lift coverage.
PDF Search, Bookmarks, and Page Count
Finding service procedures: OCR text search covers the manual pages, though recognition errors can affect words and tables. Embedded bookmarks open the index, service-data tables, and selected repair sections. The added cover is image-only. Zoom in to read small labels and legends in the service illustrations.
The download is one printable, English-language PDF with 96 pages, including 95 manual pages and one added cover page.
Tractor Overhaul and Diagnostic Coverage
These are selected shop procedures from the manual. It also covers water-pump resealing and brake drum removal.
- Engine repair: Engine removal, cylinder-head and rocker-arm service, valve timing, piston inspection, crankshaft bearings, and lubrication-system repairs.
- Fuel systems: Marvel-Schebler and Zenith carburetor service, Ensign LP-gas regulator overhaul, Bosch PSB injection-pump service, and pintle-nozzle testing.
- Clutches and transmission: Gearbox disassembly, shaft and bearing replacement, engine-clutch adjustment, transmission-clutch service, and CA final-drive clutch overhaul.
- Final drive and brakes: Differential carrier-bearing adjustment, bevel-gear backlash checks, bull pinion shaft repairs, and brake-band and brake-shoe service.
- Hydraulic power lift: Pump overhaul, hold-position and unloading-valve checks, delayed-lift diagnosis, hydraulic ram service, and draft-control linkage adjustment.
- Front axle and steering: Pedestal and spindle-bearing adjustment, tricycle and wide-front configurations, Lemoine-type knuckles, and steering-gear service.
- Electrical service: Delco-Remy generator, regulator, and starter test specifications, plus magneto and battery-ignition timing procedures.
This manual is suited to mechanics comfortable with tractor splitting and precision measurement. Complete diesel nozzle testing requires a dedicated nozzle tester.
Valve Gear and Engine Service
Model G engine: The Continental N62 has unsleeved cylinders and a separate valve-gear procedure. The governor section identifies a blocked camshaft vent as a possible cause of poor operation. The timing-cover section warns that puller screws extending too far into the crankshaft pulley can damage the cast cover.
Timing and diesel valve gear: Figure AC30 shows how the timing marks differ between early BE engines and later BE and CE engines. The WD45 Diesel section shows where to measure camshaft end play and describes thrust-plate and gear-hub correction. It also covers the energy cells and intake preheater.
Carburetors, LP-Gas, and Diesel Injection
Gasoline and LP-gas: The manual gives float settings and Marvel-Schebler calibration and service-part data. It refers readers to the applicable parts catalogs for Zenith calibration details. WD45 LP-gas coverage includes Ensign carburetor adjustment, economizer operation, and Model W regulator troubleshooting and overhaul.
Bosch injection: The diesel troubleshooting chart helps trace hard starting, irregular running, and loss of power before components are removed. Bosch PSB coverage includes injection timing, transfer-pump service, and hydraulic-head replacement. The pintle-nozzle section shows how leakage, spray pattern, and opening pressure are assessed and refers unresolved nozzle faults to a diesel service station.
Transmission, Clutches, and Final Drive
Gearbox and torque tube: Separate overhaul sections distinguish the early straight-cut WD transmission from the later helical-cut design. The procedures cover gear bushings, retaining rings, and bearing adjustments. Torque-tube illustrations identify the clutch shaft, seal arrangements, and PTO drive components.
Continuous-power PTO: The CA uses a Lambert clutch in the right final drive. WD and WD45 procedures distinguish the engine clutch from the Rockford over-center transmission clutch used with continuous-power PTO. For tractor splitting and heavy assembly removal, verify lifting points and secure the tractor on heavy-duty stands.
Hydraulic Lift and PTO
Pump and valve diagnosis: The manual distinguishes the B/C two-plunger pump, the Model G gear-type pump, and the CA/WD/WD45 four-plunger units. The sectional view in Figure AC164 helps identify the hold-position and unloading valves. The troubleshooting material covers implements that will not lower, erratic lift, and abnormal pressure, alongside ram service and system bleeding.
Implement drives: The manual covers RC/WC mechanical power-lift repairs and PTO and belt-pulley shaft, bearing, seal, and gear adjustments. Model G coverage addresses its belt-pulley and hydraulic-drive arrangements.
Steering, Cooling, and Electrical Reference
The front-end procedures distinguish Gemmer, Ross, and Lavine steering gears. The cooling sections separate Model G’s thermo-syphon system from pumped systems. Electrical coverage is organized around component tests and ignition timing. Wiring diagrams are not included.
A Look at Valve, Camshaft, and Cooling Specifications
The CA tappet setting is 0.012 inch hot for both valves. For the WD45 Diesel, the service-data table gives a hot intake tappet clearance of 0.010 inch, and the timing-gear section gives normal camshaft end play of 0.003–0.008 inch.
The WD45 Diesel service-data table also lists a cooling-system capacity of 4¼ gallons.
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