ASV SR-70 / SR-80 Rubber Track Loader Operation and Maintenance Manual (P/N 2045-830)

Use the operation manual for controls and scheduled upkeep, the service manual for testing and repair, and the SR-80 parts catalog to match components to the machine’s build.

The service manual covers machine-side engine work and refers engine-specific faults to a Perkins repair facility. The separate electrical and hydraulic schematic sheets listed under Chapter 20 fall outside this download. The circuit and routing drawings in Chapter 3 are included.

PDF Search and Drawing Detail

Text search and diagram labels: All three PDFs contain searchable text and have no embedded bookmarks. Some drawing labels sit outside the text search. Small labels on the service manual’s attachment-outlet, pilot-block, and control-routing drawings are faint and can be hard to read even when enlarged.

The ZIP contains three printable PDFs totaling 250 pages. The counts include the covers, four service-log pages in the operation manual, and blank or page-number-only leaves in the operation and service manuals.

Loader Controls, Hydraulic Testing, and Track Service

This selection of topics focuses on operation and workshop work. The manuals also cover glow-plug starting and hillside operation.

• Attachment controls: Pilot joysticks, lift-arm float, electrical attachment controls, and the distinction between variable low flow and continuous auxiliary operation.
• Scheduled maintenance: Lubrication, cooling-pack cleaning, fuel and air filters, belt service, and engine and hydraulic fluid changes.
• Hydraulic testing: Contamination checks, charge and auxiliary pressure tests, drive and lift-arm pressure checks, auxiliary flow testing, and Posi-Power adjustment.
• Hydraulic rebuilds: Disassembly and assembly of cylinders, the lift-arm control valve, the drive motor’s brake and motor sections, and the drive and auxiliary pumps.
• Undercarriage work: Track tension and replacement, sprocket rollers, idler and bogie-wheel service, and idler-hub rebuilding with metal face seals.
• SR-80 parts identification: Serial-specific exploded views and parts lists for 26 assembly groups, including cab, heating, air conditioning, and quick-attach options.

The operation manual is for loader operators and owners handling routine upkeep. The service procedures are for technicians. ASV specifies factory-trained personnel for hydraulic component disassembly and a lift-arm brace for work beneath raised arms.

Auxiliary Flow and Quick Attach

The controls section explains the instrument display, switch panels, and foot throttle. It shows how the low-flow coupler interlock disables high-flow selection when a low-flow attachment is connected. Power quick attach is standard on the SR-80 and optional on the SR-70. The operating section illustrates bucket filling, grading, truck loading, turf work, and attachment changes.

Machine-Side Repair and Circuit Drawings

Removal and installation chapters cover the Perkins 804C-33T, battery, exhaust, and air cleaner, along with the hydraulic reservoir, charge pump, radiator/oil cooler, fuel tank, pilot controls, and operator enclosure. The service manual identifies ASV jack stands P/N 0402-900, test gauge kit P/N 0402-935, service cart P/N 0402-871, and model-specific hub press tools.

Chapter 3 traces the hydraulic charge, auxiliary, and drive circuits and shows the lift-arm valve, pilot generation block, electrical attachment outlet, and control hose routing. During lift-arm valve service, the main and load-check spools belong in their original positions because the load-check spools affect bucket self-leveling.

Parts Differences by SR-80 Build

The catalog separates SEA/MP-2 and SEB/MP-1 cab and control layouts. It identifies changes to the enclosed cab and harnesses, early ROPS and window differences, paired lap-bar updates, welded and bolt-on hood hinges, track-width options, and the opposite heater-cable action on MP-1 machines. Early SEA bucket/tilt cylinders with the distinct port design require a matched pair when converting to the current design.

Examples From the Cycle-Time and Roller-Wear Checks

For both models, the service specifications list lift-arm raise at 3.5 seconds (±0.35) and bucket curl at 1.7 seconds (±0.17) for comparing hydraulic response.

The drive-sprocket roller inspection shows a roller wear limit of 0.088 in., equivalent to 35% of the original thickness.