This is the factory service manual for the Mustang 2803ZT compact excavator (serial prefix AG, 2008), powered by the Yanmar 3TNV76-NNS diesel engine. Published as part number 918279, it runs 154 pages of specifications, maintenance, and repair procedures.
Coverage includes chassis and engine specifications, the full maintenance program, engine service on the 3TNV76-NNS, the hydraulic system with its PVD pump and main valve block, the electrical system with the fuse box, and the options group for counterweight and auxiliary hydraulics. Tightening torques and fluid capacities are listed throughout.
With this PDF you can set valve clearance, bleed and service the fuel system, pressure-test the hydraulics, trace electrical and fuse faults, and connect attachments correctly. It puts dealer-level detail in the hands of an owner or independent mechanic.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | 23-34 | Chassis, Engine (Fuel Injection Pump, Capacities, Tightening Torques), Hydraulic System (Work Hydraulics, Auxiliary Hydraulics Oil Flow), Undercarriage and Swivel Unit, Dozer Blade |
| Maintenance | 35-84 | Fluids and Lubricants (Additional Oil Change and Filter Replacement), Maintenance Label (Explanation of Symbols on the Maintenance Label) |
| Engine | 85-96 | 3TNV76-Nns Engine Overview, Fuel System, Checking and Adjusting Valve Tip Clearance, Tightening Order for Cylinder Head Bolts, Checking the Injection Nozzles (Pressure Check) |
| Hydraulic System | 97-128 | Hydraulic Pump Pvd-0B-23Bp-8G3-5083A (Pump Unit: Exploded View, Pilot Oil Supply Unit), Main Valve Block (Ports, Legend, Diagram, Pressure Limiting Valves, Pump Assignment) |
| Electric System | 129-140 | Ohm's Law; Power, Measuring Equipment, Measuring Methods, Cable Color Coding, Relays (Use, Mode of Function), Socket, Electric Units, Fuse Box |
| Options | 141-154 | Counterweight (Specifications), Connecting Auxiliary Hydraulics, Attachments, Auxiliary Hydraulics Connections |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travelling drive torque | 88 lb.-ft. (120 Nm) | p. 28 |
| Hydraulic hose fittings torque (light execution range) | 11 lb.-ft. (15 Nm) to 162 lb.-ft. (220 Nm) | p. 28 |
| Hydraulic hose replacement interval | every six years | p. 71 |
| Battery voltage | 12 V | p. 25 |
| Battery capacity | 44 Ah | p. 25 |
| Starter voltage | 12 V | p. 25 |
| Starter power | 1.4 hp (1.1 kW) | p. 25 |
| Fuse F1 rated current | 40 A | p. 26 |
| Fuse F2 rated current | 50 A | p. 26 |
| Track roller torque | 88 lb.-ft. (120 Nm) | p. 28 |
| Bucket pin diameter | 1-1/2 in. (40 mm) | p. 34 |
| Engine Output | 20.4 hp (15.2 kW) @ 2500 rpm | p. 23 |
