New Holland L175 Skid Steer / C175 2007 Track Loader Repair Manual (P/N 87630289)

This New Holland OEM repair manual covers the L175 wheeled skid steer and C175 track loader, both identified with the N844LT 56-PS four-cylinder turbo-diesel. It is the 5/07 Complete Repair Manual, Part #87630289. Because the procedures extend through component overhaul, hydraulic flow and pressure diagnosis, electrical fault isolation, and A/C recovery work, the material is suited to professional technicians and experienced mechanics with lifting equipment, measuring tools, hydraulic test equipment, and refrigerant-service equipment.

• Document set: A 988-page PDF comprising one opening page, a 20-page combined contents section, and Books 1-4: Book 1 (87634727), 170 pages; Book 2 (87634730), 288 pages; Book 3 (87634731), 246 pages; and Book 4 (87634732), 263 pages.
• Engine repair: Covers engine removal, disassembly, and reassembly; cylinder-head and valve-seat service; piston, connecting-rod, crankshaft, camshaft, timing-gear, oil-pump, cooling, and fuel-system work; injection-pump installation, spill timing, turbocharger service, and post-overhaul operation.
• Undercarriage and final drive: Separates C175 track work - rubber-track removal and tensioning, sprockets, rollers, idlers, the tension mechanism, and track-drive-motor overhaul - from L175 axle-housing, drive-chain, sprocket, wheel, and final-drive repair.
• Hydrostatic transmission: Provides charge-pressure, high-pressure, case-drain, efficiency, and air-ingress testing; pump and motor removal and internal repair; system cleaning; post-rebuild startup; neutral adjustment; ISO-pattern pilot-control checks; and pilot-system bleeding.
• Loader hydraulics: Details boom, bucket, and auxiliary-circuit diagnosis; control-valve, gear-pump, high-flow-pump, and cylinder overhaul; pedal, hand-control, and pilot-control service; and separate hydraulic circuits for mechanical- and pilot-control machines.
• Electrical and controls: Supplies standard and Cab Upgrade wiring, EIC and optional AIC troubleshooting, interlock and fuel-supply diagnosis, relay and switch service, plus alternator and starter testing, disassembly, inspection, and repair.

Chassis, Cab, and Climate-Control Work

Further chassis coverage includes parking-brake disassembly and solenoid checks; ROPS and cab/boom removal or tilting; seat and cab-inner-shell service; boom, link, pivot-hub, and attachment-mounting-plate repair; and bucket and loader-faceplate inspection. The climate-control chapter covers refrigerant recovery, evacuation and charging, compressor and clutch repair, condenser, evaporator and receiver/drier service, belt adjustment, leak testing, and fault diagnosis.

Variant-specific material separates standard and Cab Upgrade machines, mechanical and ISO-pattern pilot controls, pedal and hand loader controls, one- and two-speed drive arrangements, standard and high-flow hydraulics, EIC and optional AIC instrument clusters, and North American and European on-road lighting. That distinction matters when selecting a wiring diagram, hydraulic circuit, or adjustment procedure.

Diagnostics, Schematics, and Shop Data

The PDF finishes with three large foldouts: an Electrical Schematic for Cab Upgrade Machines, an Electrical Schematic for Mechanical and Pilot Control Machines, and a Hydraulic Schematic for Mechanical and Pilot Control Machines. Representative diagram sets include the Starting System, Safety Interlock and Fuel Supply System, Instrument Cluster Monitoring System, Loader Arm Auxiliary Electric Power Controls, Pilot Hydraulic Controls, and multi-frame control-valve and high-flow hydraulic circuits.

Reference material includes component-specific torque tables, capacities and approved fluids, hydraulic pressure, flow, and case-drain test specifications, engine service standards and inspection limits, electrical test values, A/C charge and compressor data, dimensions, and labor guides. Named tooling includes Cab Tilting Tool 86590084, Compression Test Adapter FNH 00120, hydraulic-tank pressurizing tool FNH22ESS95, hydrostatic-motor preload tool 380001894, and the OEM1415 refrigerant recovery, recycling, and charging station.

Repair Cautions and Scope Limits

The hydrostatic-pump rebuild chapter warns that forcing the rotating group onto the splined shaft can displace its loading pins, causing pin failure and early transmission failure. Cab and boom tilting sections also call out trapped wiring, hoses, and the throttle cable; these can be damaged as the cab is lowered and may lead to electrical component damage.

Coverage is limited to these two N844LT-equipped models, and New Holland instructs users to keep the separate operator's manual with this repair manual. The ROPS section covers removal and installation but expressly prohibits welding, straightening, or repairing a damaged cab structural frame. Raised-boom service requires boom-lock support and attachment removal, while hydraulic and refrigerant work require pressure isolation or recovery and appropriate shop safety procedures.