2002 John Deere CS36, CS40, CS46, CS52, CS56, CS62, CS71, CS81 Chainsaw Technical Manual (P/N TM1917)

John Deere technical manual TM1917, August 2002 edition, covers the North American CS36, CS40, CS46, CS52, CS56, CS62, CS71, and CS81 chainsaws. It combines model-specific engine repair procedures with diagnostic tests and service specifications.

• Engine repair: Crankcase disassembly, piston and ring inspection, crankshaft bearing and seal replacement, and short block assembly for the covered model groups.

• Fuel and intake: Carburetor pressure tests and adjustments, fuel-filter inspection, fuel-pump and pulse-line testing, primer-bulb diagnosis, and intake-manifold service.

• Ignition: Output, switch, and module tests; rotor inspection; rotor and ignition-module removal and installation; and ignition-module air-gap adjustment.

• Chain brake and lubrication: Brake-band inspection, linkage repair, clutch service, oil-tank vent testing, and model-specific oil-pump procedures.

• Starter and controls: Recoil-starter disassembly, spring-tension checks, throttle-trigger and lockout repairs, rear-handle removal, and vibration-isolator replacement.

• Service specifications: Bore, stroke, starter-rope dimensions, model-specific adjustment data, metric and inch torque tables, fastener identification charts, and component-specific tightening specifications.

John Deere wrote this manual for experienced technicians working on these chainsaws.

Fuel and Ignition Diagnosis

Fuel-system and ignition troubleshooting charts link no-start symptoms to individual tests. The crankcase/cylinder pressure and vacuum checks help isolate air leaks behind hard starting, erratic idle, and poor acceleration; compression testing provides separate hot- and cold-engine reference ranges.

Model differences: The CS36 and CS40 carry their pulse passage in the intake boot; the other models use a separate pulse hose. Primer-bulb testing applies to CS46, CS52, CS56, and CS62.

Ignition checks: The manual distinguishes the two ignition-module groups and explains why a resistance check alone cannot prove a module good or bad. The CS81's electronic speed limiter is covered separately. Electrical diagnosis uses labeled photographs and test instructions; circuit wiring diagrams are not included.

Factory carburetor settings, break-in guidance, and emissions-related adjustments are covered. The manual directs carburetor adjustments to a John Deere servicing dealer.

Internal Engine Repair and Assembly Limits

Separate repair sections cover CS36/CS40, CS46/CS52, and CS56/CS62/CS71/CS81. They extend through piston, ring, cylinder, seal, and bearing inspection to short block reassembly.

For CS46/CS52 and the four larger models, a worn connecting rod, rod bearing, or crankshaft calls for replacement of the complete crankshaft assembly.

The larger models' thin-wall magnesium crankcase halves can crack or scratch during separation. Rotor service also warns that blows to the ceramic magnets can reduce or destroy magnetism.

Oil Pumps, Chain Brakes, and Service Illustrations

Oil-pump scope: The CS36/CS40/CS46/CS52 pump housing has no serviceable internal components. The larger models have documented pump disassembly, including the flow-adjustment screw and pump shaft.

Chain-brake procedures include wear inspection and operating checks. Muffler service covers the spark screen, carbon buildup, and exhaust-port inspection; air-filter and cylinder-cover removal procedures are also included.

Muffler exploded views and recoil-starter assembly drawings support the repair sections. Component Location views, Spark Plug Troubleshooting drawings, and the illustrated crankcase test setup support identification and diagnosis.

The special-tool list identifies kit UP06771, pressure tester 1043900/PS10021, and air-gap gauge 001000004/PS10019.

Follow the manual's safety precautions for moving chains, flammable fuel, and stored tension in recoil-starter springs.

A Preview of Crankcase Tests and Ignition Clearances

These are a few of the test and adjustment specifications included in the manual.

For all covered models, the crankcase/cylinder leak test specifies 34–41 kPa (5–6 psi) of positive pressure and a separate vacuum test at 12–15 cm Hg (4.7–5.9 in. Hg).

The air gap between the ignition module and rotor is 0.3 mm (0.012 in.) across the listed models.

Searchable PDF and Page Breakdown

Text search and bookmarks: The manual's body text is searchable, with embedded PDF bookmarks for the main sections, model specifications, diagnostic tests, repair procedures, and index.

The download is one printable, 86-page English PDF: 78 numbered manual pages, four index pages, one cover, one introduction, and two unnumbered blank pages. Four of the numbered pages are otherwise blank; all are included in the total.