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

This New Holland factory repair manual covers the 2007 L175 wheeled skid steer and C175 track loader, both powered by the N844LT turbo-diesel. It is the May 2007 edition (P/N 87630289). New Holland directs technicians to use it alongside the separate operator’s manual.

Search, Bookmarks, and Foldout Schematics

Finding procedures and diagram details: Search the workshop text or use bookmarks to jump to the four books, their main sections, and the foldout schematics. Some in-chapter diagram labels are embedded in illustrations and need to be read on the page. Small connector numbers, pin labels, and wire codes on the foldouts are easiest to read when zoomed in.

The download is one printable English PDF with 988 pages. It includes one added opening page, 20 pages of combined contents, Book 1 (87634727, 170 pages), Book 2 (87634730, 288 pages), Book 3 (87634731, 246 pages), Book 4 (87634732, 260 pages), and three foldout schematic pages.

Engine, Drive, and Loader Repairs

The following are selected workshop procedures. The manual also covers rear counterweight support removal and hydraulic oil cooler service.

• Engine overhaul: Step-by-step removal, disassembly, and reassembly, including cylinder-head and valve-seat work, pistons, connecting rods, crankshaft, camshaft, timing gears, and oil pump. Fuel-system procedures cover injection-pump installation and spill timing.
• Undercarriage and final drive: C175 rubber-track removal and tensioning, sprocket, roller and idler work, and track-drive-motor overhaul. L175 coverage includes axle housings, drive chains, sprockets, wheels, and final-drive repair.
• Hydrostatic transmission: Charge-pressure, high-pressure, case-drain, efficiency, and air-ingress tests, plus pump and motor repair, neutral adjustment, and ISO-pattern pilot-system bleeding.
• Loader hydraulics: Boom, bucket, and auxiliary circuit diagnosis, with control-valve, gear-pump, high-flow-pump, and cylinder overhaul and separate coverage for pedal, hand, and pilot controls.
• Electrical and controls: Standard and Cab Upgrade wiring, interlock and fuel-supply diagnosis, relay and switch checks, EIC and optional AIC troubleshooting, and alternator and starter testing and repair.

The manual is suited to professional technicians and experienced mechanics equipped for component lifting, precision measurement, and hydraulic pressure and flow testing. Air-conditioning work calls for refrigerant-service equipment.

Drive Diagnosis and Wiring Variants

The hydrostatic troubleshooting charts pair low drive power with charge-pressure and case-drain checks, helping distinguish a charge-supply problem from internal pump or motor leakage before teardown. Separate ISO-pattern pilot procedures cover anti-stall control pressure and circuit relief checks. The manual also covers system cleaning and post-rebuild startup.

The wiring and hydraulic sections distinguish mechanical and pilot controls, single- and two-speed drive arrangements, standard and high-flow hydraulics, and North American and European on-road lighting. The three foldouts cover Cab Upgrade electrical circuits, standard electrical circuits, and mechanical- and pilot-control hydraulics. In-chapter diagrams cover starting, safety interlock and fuel supply, instrument cluster monitoring, and auxiliary electric power controls.

Chassis, Cab, and Climate Control

Chassis procedures cover parking-brake disassembly and solenoid checks, cab and boom tilting, seat and cab-inner-shell service, and inspection or repair of the boom, links, pivot hubs, attachment mounting plate, bucket, and loader faceplate. The ROPS section covers removal and installation and prohibits welding, straightening, or repairing a damaged protective structure. Raised-boom service requires boom-lock support and attachment removal.

The climate-control chapter covers refrigerant recovery, evacuation and charging, leak testing, compressor and clutch repair, and condenser, evaporator, and receiver/drier service. The engine chapter also covers turbocharger and cooling-system service and post-overhaul operation.

Shop Data and Reassembly Cautions

Reference tables cover torque, fluid capacities, dimensions, engine wear limits, electrical test values, and A/C charge data. Labor guides provide estimates for job planning. Specified equipment includes cab tilting tool 86590084, compression test adapter FNH 00120, hydraulic tank pressurizing tool FNH22ESS95, hydrostatic motor preload tool 380001894, and the OEM1415 refrigerant service station.

Forcing the hydrostatic pump’s rotating group onto its splined shaft can damage the loading pins and lead to early transmission failure. Lowering the cab can trap wiring, hoses, or the throttle cable and damage components.

Selected Valve Clearance and A/C Belt Specs

The N844LT engine reassembly section specifies a cold clearance of 0.2 mm (0.0078 in.) for both intake and exhaust valves. For machines equipped with air conditioning, the compressor belt check specifies 200–245 N (45–55 lb) measured with a belt tension gauge.