1980s Snapper 1600 / 1650 / 1855 Garden Tractors & Mower Attachments Service Manual (PN# 07005)

Snapper service manual #07005 covers the 1980s 1600, 1650, and 1855 garden tractors and their mid-mount mower attachments, including gear-drive and hydrostatic configurations.

Text search and wiring detail: PDF text search and embedded bookmarks are not available. Small wire-color, wire-gauge, and terminal labels in the main wiring diagram are readable when enlarged.

• Transmission repair: Gear-drive transaxle and gearbox overhaul, Eaton hydrostatic transmission disassembly, charge-pump inspection, and symptom-based troubleshooting.

• Hydraulic lift: Pressure testing, relief adjustment, mid-mount and three-point hitch control-valve reconditioning, and lift-cylinder seal replacement.

• Steering and brakes: Model-specific steering-gear rebuilds, front-axle and wheel-bearing service, band and disc brake repair, and hydrostatic control-linkage adjustment.

• Engine and fuel systems: Single- and twin-cylinder engine removal, carburetor and mechanical governor adjustments, fuel-filter replacement, and fuel-line routing.

• Electrical diagnosis: Ignition service, interlock-switch tests, alternator charging checks, regulator-rectifier diagnosis, and wiring references for starting and accessory circuits.

• Mower service: Deck removal and installation, blade synchronization, timing-belt adjustment, spindle repair, mule-drive service, and mower gearbox overhaul.

This manual is suited to experienced mechanics equipped for tractor lifting, hydraulic pressure testing, electrical diagnosis, and internal drivetrain repair.

Gear-Drive and Eaton Hydrostatic Repair

The 1600 section covers its transaxle with four forward gears and reverse, plus the separate drive gearbox. Shaft, bearing, seal, and differential service includes a Differential Parts Sequence drawing showing component order during reassembly.

For the 1650 and 1855, the Eaton 1100-031 coverage extends to the charge pump, radial ball-piston pump and motor, pintle valve body, check valves, acceleration valves, and dampening pistons. Inspection criteria include bushing clearances and matched-component replacement.

The Schematic of Hydrostatic Drive System explains the oil circuit. The Transmission Trouble Shooting Guide separates one-direction travel faults, complete loss of drive, erratic motion, and output loss after warm-up.

Ball-pistons are individually matched to their rotor bores; losing that pairing can require replacement of the rotor and piston assembly. Output-shaft installation calls for Tool No. 1145, and seal replacement is illustrated with a sleeve tool.

Steering, Brakes, and Hydraulic Lift

Separate steering procedures distinguish the 1600/1650 gear assembly from the 1855 arrangement, whose front PTO forms part of the front-axle pivot. Bellcrank bearings, spindle bushings, wheel bearings, and toe-in adjustment are covered.

Brake service separates the 1600 band-and-drum system from the hydrostatic models' disc brake calipers. Repair kit 6-0538, the revised parking-brake lever, and neutral-return linkage adjustments receive specific attention.

The lift section covers pressure checks and reconditioning of both control-valve bodies, including their Mylar shims and seals. The implement relief valve is located in the auxiliary control valve, separate from the transmission's charge-pressure relief.

Lift-cylinder repair is illustrated for one cylinder type; the tractor parts manual is needed to identify the installed cylinder variant.

Engine, Fuel, and Electrical Diagnosis

Engine coverage is limited to troubleshooting, routine carburetor and governor adjustments, and removal and installation. Internal engine overhaul is outside this manual's scope and is assigned to engine-manufacturer-authorized dealers.

Fuel-system coverage distinguishes the 1855 tank configuration from the 1600/1650 arrangement. It includes in-line filter replacement, tank inspection, insulation pads, and hose routing around the engine's rotating grass screen.

The Garden Tractor Schematic Wiring Diagram and Circuit Breaker Wiring drawing support ignition, starting, lighting, and charging diagnosis. Test tables cover interlock switches and alternator/regulator-rectifier faults.

Separating the seat-switch ignition circuit from the cranking interlocks helps distinguish an engine that will not crank from one that cranks but will not start.

Mower Deck Repair and PTO Coverage

The 42- and 48-inch decks use a front mule drive on the 1600/1650; the 54-inch deck uses the 1855 PTO drive and gearbox. Procedures cover belt tension, blade timing, spindle housings, deck leveling, and gearbox bearing, seal, and backlash work, supported by the Gearbox Components drawing.

The gearbox installation notes warn that misalignment between the splined output shaft and center pulley can damage the pulley splines.

PTO scope: Front-PTO service and rear-PTO removal appear within other tractor sections. The separate Section 9, Power Take Off Systems, listed in the index is not included in this PDF.

Service precautions address supported tractor lifting, electrical isolation where specified, sharp mower blades, and gasoline ignition hazards.

PDF Contents and Included Pages

This printable English-language file is a 64-page PDF, comprising 60 technical pages, one cover, one service-section index, and two service-notes pages. The cover, index, and notes pages are already included in the total.