Gehl R135, R150, R165 and Mustang 1350R, 1500R, 1650R Skid-Steer Repair Manual

Key Highlights by Chapter

The manual opens with a detailed Introduction and Safety section (page. 9 – 26) that explains signal-word conventions, machine orientation, registration requirements, vibration data, and fire-extinguisher placement. It then walks the reader through an extensive set of safety practices—pre-start inspections, operating precautions, emergency shutdown, transport and lifting guidelines, and specific warnings for batteries, fire, and crystalline-silica exposure. All safety decals, their locations, and replacement instructions are listed here as well.

Next, Operator-protection systems are covered (page. 27 – 36). This part describes the seat, suspension, belts, optional torso restraint, ROPS/FOPS structures, the Hydraloc™ interlock and its test procedures, the parking brake, emergency rear-window exit, lift-arm support strut, and the optional battery-disconnect switch.

The manual devotes a sizable block (page. 37 – 68) to Indicators, controls, and displays. Every keypad lamp, icon, and button is decoded, followed by in-depth coverage of ignition, throttle, and three alternative control layouts—T-Bar, joystick, and hand/foot. Two-speed drive, Hydraglide™ ride control, lighting, HVAC, wipers, power ports, attachment-mount systems (All-Tach® and Power-A-Tach®), and auxiliary hydraulics round out this section.

The Operation chapter (page. 69 – 92) provides start-to-shutdown guidance: daily checks, cab entry/exit, cold-start and run-in procedures, hill and rough-terrain driving, public-road transport, using lift-arm float and ride control, changing and coupling attachments, towing, crane lifting, and the full Diesel Particulate Filter regeneration workflow.

From Maintenance onward (page. 93 – 126), the book supplies schedules, logs, lubrication points, and job sheets for everything—engine oil, fuel, air, and cooling systems; hydraulic oil and filters; chaincases, tires, electrics; long-term storage and decommissioning. Subsequent chapters dive even deeper: hydrostatic and drive-train service (page. 127 – 162), hydraulic-system diagnostics and cylinder rebuilding (page. 165 – 198), electrical power distribution and CAN-bus troubleshooting (page. 199 – 233), structural repairs to lift arms and ROPS/FOPS (page. 235 – 264), and full engine removal/installation procedures for Tier-4 models (page. 265 – 304).

The final third of the book offers symptom-based troubleshooting guides, complete error-code lists, and comprehensive hydraulic and electrical schematics for every model configuration (page. 305 – 344). A specification compendium rounds things out with fluid capacities, weights, payloads, engine data, travel speeds, sound and vibration levels, dimensions, feature matrices, common material densities, and a full torque-spec table—followed by a detailed index for quick look-ups.

In short, this manual is a one-stop, field-to-workshop reference: it marries exhaustive safety coverage with clear operating instructions, step-by-step maintenance and overhaul procedures, advanced diagnostics, and every technical specification needed to keep these machines running safely and efficiently.