Harley-Davidson Golf Cart D, DF, DC, MGIV, DE4 Service Manual Set, 1963–1980 (P/N 99496-80)

• Covers 1963–1980 Harley-Davidson gasoline models: three-wheel D Golf Car, DF Personnel Carrier, and DC Utilicar, plus the four-wheel D4 Golf Car. D4-specific coverage begins with 1972 models.
• Engine repair includes cylinder and piston inspection, crankcase disassembly, connecting-rod service, crankshaft truing, bearing replacement, and reassembly of the single-cylinder, air-cooled Model D two-cycle engine.
• The Scootaway automatic V-belt drive receives primary and secondary flange overhaul procedures, belt inspection, drive alignment, and model-specific clearance and shim adjustments.
• Brake coverage separates D/D4 mechanical driveshaft-disc brakes, DF/DC rear drum brakes, and 1966–1972 DC hydraulic brakes, including master-cylinder and wheel-cylinder repair and bleeding.
• Chassis procedures address steering-gear adjustment, front-fork and D4 front-suspension overhaul, rear-fork bushings, and engine-mount vibration diagnosis.
• Electrical fault tracing covers starter sole| Publication | Pages | | --- | ---: | | Columbia ParCar Service Manual, January 2001, P/N 99496-80 — 1963–1980 Harley-Davidson D, DF, DC, and D4 gasoline models | 204 | | Columbia ParCar Gasoline Car Service Manual, © 1984 — 1963–1980 Harley-Davidson D, DF, DC, and D4 gasoline models, with appended wiring sheets | 207 |

The two editions share the same core service material across Product, Chassis, Engine, Transmission, and Electrical. The appended sheets in the 1984 PDF provide additional wiring references.

Repair procedures cover gasoline models. Electric-model coverage is limited to wiring diagrams.

PDF Navigation and Wiring Detail

Text search and diagram readability: Text search and embedded bookmarks are unavailable in both PDFs. Small wiring labels in the January 2001 PDF are generally clear when enlarged. Some terminal markings and wire codes in the 1984 PDF’s appended diagrams remain hard to read at higher zoom.

The ZIP contains two printable PDFs totaling 411 pages, with substantial overlap. The January 2001 PDF includes two covers, 12 notes pages, and six blank pages. The 1984 PDF includes 24 appended wiring pages.

Two-Cycle Engine, Drive, and Electrical Service

These are selected topics from the manuals. They also cover off-season storage and maintenance-free battery testing.

• Gasoline models: Three-wheel D Golf Car, DF Personnel Carrier, and DC Utilicar, plus the four-wheel D4 Golf Car beginning with 1972 models.
• Engine repair: Cylinder and piston inspection, crankcase disassembly, connecting-rod service, crankshaft truing, bearing replacement, and reassembly of the air-cooled Model D engine.
• Scootaway V-belt drive: Front and rear drive flange overhaul, belt inspection, drive alignment, and model-specific clearance and shim adjustments.
• Brakes: D/D4 mechanical driveshaft disc brakes, DF/DC rear drum brakes, and 1966–1972 DC hydraulic brake service, including master-cylinder and wheel-cylinder repair and bleeding.
• Chassis and steering: Steering-gear adjustment, three-wheel front-fork service, D4 front-suspension overhaul, rear-fork bushings, and engine-mount vibration diagnosis.
• Electrical diagnosis: Starter solenoid, reversing switch, diode, and ignition-coil tests, with wiring diagrams organized by model and year.

The basic maintenance and repair sections support owners servicing their carts. The major repair procedures are written for professional golf car mechanics.

Maintenance and Fault Finding

Frame VIN and engine-number references help match the cart to the relevant service information. Model-specific lubrication charts identify service points, and the Trouble Location Chart directs readers from symptoms such as excessive vibration or a no-start condition to the sections that cover likely causes.

Engine Rebuild and Fuel-System Diagnosis

The engine section distinguishes low- and high-compression heads, including the high-compression applications on 1971-and-later DC engines and Model D engines above the applicable serial break. Rebuild coverage includes cylinder boring and honing, ring fitting, mainshaft runout, bearing fits, crankshaft end play, and cylinder-head bolt torque. The assembly cautions explain how twisting the cylinder can displace the rings from their locating pins and break them.

The Carburetor Cross-Section traces fuel and air passages through the crankcase-pulse diaphragm pump and carburetor. Service procedures cover inlet-needle leak testing, reed-valve inspection, and throttle, choke, and governor adjustments. The tool listings identify Crankshaft Tool Set 96122-63 and Carburetor Leak Tester 94750-68. The crankshaft section describes a separate press fixture for 1977–1980 assemblies.

Reversing Gearboxes and Rear Axles

The Reversing Unit and Coupling exploded view identifies the pinions, shifter clutch, bearings, and couplings used in the mechanical gearbox. Separate procedures distinguish the late-1977 to early-1978 all-aluminum differential from earlier and late-1978-and-later axle assemblies. They cover bearing preload, backlash, shim selection, and lubricant capacities.

A sectional view supports service of the 1963 to early-1977 wheel lockout hub. The front drive section identifies the weights used in the 1980 cast-iron floating flange and shows how that assembly differs from the ball-operated versions.

Frame Alignment and Steering

Frame drawings distinguish three- and four-wheel chassis, including the basic frame dimensions for the 1975-and-later D4. Tiller steering uses a chain through 1973 and a slider block from 1974. Steering-wheel systems have separate worm-bearing, over-center, and tie-rod adjustments. The suspension section links specific vibration symptoms to fork bushings and engine mounts.

Starter-Generator, Charging, and Ignition

SIBA, Bosch, and Hitachi starter-generators have separate exploded views and service procedures. Internal checks cover armatures, field coils, brushes, and commutators. The Starter-Generator Test Circuit supports output testing, and the charging section distinguishes 1967 to early-1968 resistor-controlled circuits from later regulator circuits. Ignition coverage includes breaker-point adjustment, spark plug gaps, and forward and reverse timing.

On late-1978-and-later rigid starter-generator mounts, an overlong belt can let the DF terminal touch the air cleaner and short out the regulator. Service precautions address battery isolation, fuel handling, and support of the raised body and chassis.

Piston Fit and Hitachi Charging Specs Preview

The Model D engine section specifies piston-to-cylinder clearance of 0.006–0.007 in. for checking fit during a rebuild. The piston diameter reference is 3/8 in. below the bottom ring groove, at 90° to the pin bore.

The Hitachi regulator charge-rate check specifies 14.5–15.5 V at 3,000 rpm with a fully charged battery and the regulator at normal operating temperature, at least 70°F.noids, reversing switches, diodes, ignition-coil testing, and model- and year-specific wiring diagrams.

Publication, File Contents, and Identification

Columbia ParCar’s Service Manual, P/N 99496-80, issued January 2001, is supplied as a 204-page PDF. A second 207-page scan carries a 1984 copyright page and appended wiring sheets. Together, the files contain 411 pages with substantial overlap, including covers and notes pages.

The repair chapters cover gasoline cars. Supplemental electric-model diagrams in the second file are wiring references, not a full electric-car repair manual.

Five core sections—Product, Chassis, Engine, Transmission, and Electrical—organize the material. Frame-VIN and engine-number identification, model-specific lubrication charts, and the Trouble Location Chart help connect a vehicle or symptom with the appropriate service section.

Two-Cycle Engine and Fuel-System Repair

The engine specifications distinguish low- and high-compression heads. High-compression head applications include all 1971-and-later DC engines and 1971-and-later D engines above serial No. 13000.

Rebuild data covers piston-to-cylinder clearances, mainshaft runout limits, bearing fits, crankshaft end play, and cylinder-head bolt torques. Cylinder boring and honing, piston-ring fitting, and crankshaft inspection extend the coverage beyond routine maintenance.

Fuel-system repair addresses the carburetor’s crankcase-pulse-operated diaphragm pump, inlet-needle leak testing, reed-valve inspection, and throttle, choke, and governor adjustments. The Carburetor Cross-Section accompanies the explanations of internal fuel and air circuits.

Tool listings identify Crankshaft Tool Set 96122-63 and Carburetor Leak Tester 94750-68. Separate press-fixture instructions address 1977–1980 crankshafts. The cylinder-assembly cautions explain a specific failure risk: twisting the cylinder can misalign the rings with their locating pins, breaking the rings and damaging the engine.

Reversing Gearboxes, Differentials, and Drive Changes

Mechanical reversing-unit service for 1963–1966 D and 1963–1968 DC models is separate from the later systems that reverse engine rotation. The Reversing Unit and Coupling—Exploded View supports gearbox work involving pinions, the shifter clutch, bearings, and drive couplings.

Rear-axle procedures distinguish the late-1977–early-1978 all-aluminum differential from earlier assemblies and late-1978-and-later axle arrangements. The sections cover bearing preload, gear backlash, shim selection, and lubricant-capacity specifications rather than treating every rear axle as interchangeable.

The Wheel Lockout Hub, Section View supports service of the 1963–early-1977 hub assembly. Transmission details also identify the weights used in the 1980 cast-iron floating flange, distinguishing that build from ball-operated versions.

Frame Geometry and Steering Configurations

Frame-alignment drawings separate three-wheel and four-wheel configurations, including 1975 and Later Model D4 Basic Frame Dimensions. These references accompany frame inspection rather than assuming one chassis layout across the series.

Tiller-steering service distinguishes the chain-operated mechanism used through 1973 from the slider-block arrangement introduced for 1974. Steering-wheel systems have their own worm-bearing, over-center, and tie-rod adjustments. Suspension diagnosis also connects worn fork and mounting components with specific vibration complaints.

Starter-Generator, Charging, and Ignition Diagnosis

SIBA, Bosch, and Hitachi starter-generators receive separate teardown and reassembly coverage. Armature growler tests, field-coil checks, brush inspection, and commutator service support internal electrical repair.

Charging diagnosis separates 1967–early-1968 resistor-controlled circuits from later voltage-regulator systems. The Starter-Generator Test Circuit accompanies output testing, while the regulator section includes Hitachi charge-rate adjustment. Ignition coverage distinguishes breaker-point adjustment from spark-plug gap specifications and addresses both forward and reverse timing.

For late-1978-and-later rigid starter-generator mounts, the belt section warns that an overlong belt can let the DF terminal contact the air cleaner and short out the voltage regulator.

Service precautions address battery isolation, fuel handling, and positive support of the raised body and chassis.