ASV RC-30, RC-50, R-Series Track Loader Service Manual (P/N 0304-820, 2010-125)

• Provides factory repair and parts coverage for the ASV RC-30, with RC-50 coverage limited to the R-Series operation and maintenance guide. The set combines the RC-30 Service Manual P/N 0304-820, publication ASVSP001 dated 06/01; the RC-30 Master Parts Manual P/N 2010-125, printed 04/09; and the RC-30/RC-50 operation guide ASVRC0OM-04 dated 11/04.
• Three PDF files total 156 pages and combine repair procedures, hydraulic system diagrams, serial-specific exploded parts views, maintenance data, troubleshooting, controls information, and pressure-check/adjustment coverage.
• Serial breaks are used throughout the parts data. Examples include Cab ROPS RSA00101-2092 / RSA02093-2785 / RSA02786-Current, Drive/Auxiliary Pump and right/left undercarriage RSA00101-2052 / RSA02053-Current, Hydraulic Reservoir RSA00101-2151 / RSA02152-Current, and Quick Attach RSA00101-2022 / RSA02023-Current. “Current” in the parts manual means current at its 04/09 print date.
• Engine coverage distinguishes the Caterpillar 3013NA installation through RSA02603 from the Perkins 403C-15 used from RSA02604 forward. The RC-50 specifications in the operations guide identify the Perkins 404C-22.

Operational and Maintenance Documentation

The RC-30 service manual includes factory repair procedures for fuel-tank and fuel-sending-unit work, radiator/oil-cooler removal and adjustment, hydraulic-reservoir service and cleaning, loader and drive joystick components, loader-valve removal, auxiliary gear pump and tandem hydrostatic pump work, pump-drive coupler service, drive motors, brakes, track and sprocket components, lift/tilt cylinders, the low-flow relief valve, and quick-attach components. It also covers fuel-system bleeding, track-tension adjustment, and charge, drive, and auxiliary hydraulic pressure checks and adjustments. Fuel bleeding is split between serial numbers 001-1357 and 1358-and-higher.

The RC-30/RC-50 operations guide documents the standard pilot-operated loader and drive controls as well as the optional Case-style control arrangement. With the Case-style setup, each joystick combines travel and loader functions, and the float position must be held manually rather than retained by the normal magnetic detent. Pre-start checks, operating limits, service intervals, grease locations, fluid recommendations, and attachment hydraulic operation are included for both models.

Some small notes matter in real repair work. The fuel-sender float mechanism can be damaged while it is pulled through the tank opening. The exhaust flex pipe must not be kinked or twisted; because the engine moves relative to the frame-mounted muffler, a stressed pipe can fail prematurely. Open hydraulic hoses and fittings are repeatedly called out to be capped during pump, valve, and reservoir repair because contamination shortens the service life of hydrostatic components.

Specification and Reference Data

The RC-30 service data identifies the Caterpillar 3013 as a 1.5-liter engine rated at 31.5 hp at 2,800 rpm, with 1,175-rpm low idle. The hydrostatic transmission is identified as a Cat AA10VG18 tandem drive-pump unit (Rexroth), with 3,800-psi drive relief pressure. Charge pressure has an important serial break: machines through RSA01056 are specified at 450-500 psi at high idle with warm oil, while RSA01057 and higher are 340-380 psi under the same conditions. The Rexroth auxiliary pump is rated at 10 gpm at 2,800 rpm with 3,000 psi relief pressure; the Husko loader valve also uses a 3,000-psi relief setting and requires 180-220 psi pilot pressure to move the spools.

Reference values include:

• Drive sprocket retainer bolt: 85 ft-lb with blue Loctite
• Transmission mounting bolts: 80 ft-lb with blue Loctite
• Drive sprocket drive-tooth bolts: 110 ft-lb dry
• Bogie wheel retaining nut: 80 ft-lb dry
• RC-30 refill capacities: 10-gal fuel tank, 8-gal hydraulic tank, 1.5-gal coolant, and 4-qt engine oil including filter
• RC-50 operating-guide data: 15-gal fuel tank, 8-gal hydraulic tank, and auxiliary hydraulics rated at 16.3 gpm and 3,000 psi
• Track adjustment check: no more than 0.75 in. deflection with 50 lb of downward force applied at the midpoint

The parts manual adds repair-relevant component changes that are easy to miss when ordering parts. Current-production lift-arm and bucket/tilt cylinders use threaded end glands, while early cylinders use an external wire ring. The listed gland, rod, and nut components do not fit the early style; ASV lists seal kit P/N 0402-946 as the repair item for those early cylinders, with cylinder replacement required if more extensive repair is needed.

Diagrams, Parts Breakdowns, and Diagnostic Scope

Named visual references include the Filtering and Cooling System, Auxiliary Circuit System, Drive Loop System, Drive/Auxiliary Pump Assembly, Undercarriage Assembly RT/LT, and Fuse Panel Assembly. The parts manual organizes exploded views across 19 named assembly groups, many split by serial number, including the cab/ROPS, chassis, hood, radiator/oil cooler, hydraulic reservoir, hydraulic controls, engine, torsion axle, lift arm, quick attach, optional enclosed cab, and cab heater.

Troubleshooting covers no-crank/no-start conditions, loss of hydraulic operation, auxiliary-flow faults, loader-float problems, charging-system faults, hot hydraulic oil, and track popping. Electrical coverage is component-level—ignition switch, gauge/warning panel, fuse box, relays, safety switches, solenoids, wiring-harness connections, and fuse-panel parts—not a full machine wiring schematic. Internal engine overhaul procedures such as cylinder-head service are outside the RC-30 service manual’s repair scope.

Hydraulic work can involve hot pressurized oil, and several procedures require lowering attachments, relieving pressure, disconnecting the battery, and keeping open hydraulic lines capped to prevent contamination. Use the factory safety information and appropriate shop equipment before carrying out repair work.