Built for the Link-Belt 5800 and 5800 Quantum hydraulic excavators, this 226-page Link-Belt 5800 service manual PDF (OEM ID 837) runs from track rollers and recoil spring to the boom, arm and bucket cylinders. Hydraulic and electrical schematics trace oil from the pump through the main control valve and rotating joint, and wiring back to the monitor system controller, while troubleshooting charts sort pump faults by symptom: abnormal noise, insufficient flow, overheating, oil leakage. Rebuild work fills more than half the book, taking the main pump, travel motor reduction gears, main control valve and hose burst check valves through teardown, inspection and reassembly. Run track shoe nuts to 557-687 ft-lb (755-932 Nm) and the pump coupling hub capscrews to 325-354 ft-lb (441-480 Nm). Every hour your 5800 sits parked is an hour the crew stands idle. Bookmarked and text-searchable, the file goes wherever you take the 5800: shop bench, service truck or jobsite trailer.
What's Inside This Link-Belt 5800, 5800 Quantum Manual
| System | Pages | Key Topics |
|---|---|---|
| Lower Mechanism | 3-32 | Travel Motor & Reduction Gears, R & I, Take-Up Roller, Recon, Upper Rollers |
| Upper Mechanism | 33-36 | Swing Motor and Reduction Gears |
| Engine | 37-40 | Throttle Motor |
| Hydraulic Equipment & Lines | 41-54 | Hydraulic System Schematic Diagram, Pilot Pump, R & I, Hydraulic Pump, Hydraulic System Cleaning Procedure, Rotating Joint |
| Controls | 55-64 | Joystick Control Valve, Travel/Service Control Valve, Main Control Valve |
| Attachment | 65-76 | Boom Cylinder, Arm Cylinder, Bucket Cylinder |
| Electric Parts | 77-84 | Electrical System Schematic Diagram, Monitor System Controller, R & I/Adjustment |
| Name Plates & Accessories | 85-90 | Capscrew Torques, Spare Pump, R & I |
| Hydraulic Pump Troubleshooting | 91-92 | Abnormal Noise, Insufficient Flow, Pressure Increase, Overheating, Oil Leakage |
| Spare Pump Recondition | 93-102 | Disassembly, Cleaning and Inspection, Assembly, Troubleshooting Chart |
| Pilot Pump Recondition | 103-106 | Disassembly, Cleaning and Inspection, Assembly, Shaft Seal Replacement |
| Hydraulic Pump Recondition | 107-134 | Disassembly, Control Section Disassembly, Directional Control Valve Removal, Assembly, Regulator Cover Assembly |
| Travel Motor Recondition | 135-148 | Disassembly, Brake Valve, Relief Valves, Speed Control Valve, Troubleshooting |
| Travel Motor Reduction Gears Recondition | 149-170 | Disassembly, Subassemblies, Cleaning and Inspection, Assembly |
| Main Control Valve Recondition | 171-190 | Disassembly, Pilot Valve, Spool Sections, Anti-Drift Valves, Assembly |
| Cylinder Recondition (Boom, Arm, Bucket) | 191-226 | Boom Cylinder, Arm Cylinder, Bucket Cylinder, Hose Burst Check Valve, Cushion Valve, Stack Valve |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Locknut (36) torque | 26-32 ft-lb (36-42 Nm) | p. 138 |
| Plugs (19,23,25) torque | 64-72 ft-lb (86-98 Nm) | p. 140 |
| Capscrews (36) torque | 289-326 ft-lb (392-442 Nm) | p. 151 |
| Track shoe nut torque | 557-687 ft-lb (755-932 Nm) | p. 11 |
| Pilot pump capscrew torque | 21-26 ft-lb (28-35 Nm) | p. 43 |
| Hydraulic pump capscrew torque | 50-55 ft-lb (65-75 Nm) | p. 48 |
| Coupling hub wedges and capscrews torque | 325-354 ft-lb (441-480 Nm) | p. 47 |
| Boom cylinder weight | 855 lb (388 kg) | p. 66 |
| Boom cylinder rod mounting eye clearance | 0.059 to 0.118 in (1.5 to 3 mm) | p. 67 |
| Filter torque | 22-28 ft-lb (30-38 Nm) | p. 129 |
| Capscrews (4) torque | 130-152 ft-lb (176-206 Nm) | p. 153 |
| Swing cushion valve plug (9,22) torque | 12 ft-lb (15 Nm) | p. 160 |
Link-Belt 5800, 5800 Quantum Common Problems This Manual Covers
Link-Belt 5800 and 5800 Quantum hydraulic pump making abnormal noise with insufficient flow to the functions
Check the hydraulic oil level first and add oil as required per the Operator's Manual; page 91 lists air suction from low oil as the first noise cause. Check the filter element and clean or replace it. Exhaust all trapped hydraulic pressure before removing it (page 46). Check the oil type and temperature, warm the oil properly, then check the input shaft rotation speed.
Manual Section: Hydraulic Pump Troubleshooting p. 91Hydraulic pressure does not increase when working, with abnormal heating in lines returning to tank
Measure circuit pressure and reset the relief valve if its setting is too low, per page 91. Check the actuation of each actuator and check for abnormal heating in lines returning to tank. That points to a leaking switching valve or actuator, so replace it after you exhaust all trapped hydraulic pressure (page 60). If the fault shows only in certain pumps, repair or replace the pump.
Manual Section: Hydraulic Pump Troubleshooting p. 91Hydraulic pump overheating with abnormal noise and heated points around the pump bearing housing
Stop operation and recheck once the oil temperature has dropped. Measure actuator speed to confirm increased pump leakage. On page 92, check for abnormal noise and heated points around the bearing housing; bearing damage or seized sliding parts mean you replace the damaged parts or repair or replace the pump. Exhaust all trapped hydraulic pressure before removal (page 46), and plan for the pump's 540 lb (245 kg) weight (page 48).
Manual Section: Hydraulic Pump Troubleshooting p. 92Travel motor does not run or travel motor speed is insufficient when travel is selected
Check and repair every component that supplies oil to the motor before you condemn it, per page 145. Check the relief valve pressure setting against the Operator's Manual. Exhaust all trapped hydraulic pressure first (page 9), then disassemble a sticking speed control relief valve and remove the foreign material (page 146). Replace the relief valve assembly if leakage continues or the spring is broken. Replace damaged o-rings and back up rings.
Manual Section: Travel Motor Troubleshooting p. 145Travel motor parking brake force not strong enough to hold the machine when parked
Check the speed control valve first. If the spool sticks and won't return to neutral, or the orifice is plugged, disassemble and clean out the foreign material (page 147). Exhaust trapped hydraulic pressure before removing components (page 9). Next, disassemble the brake valve to look for a fatigued or broken spring, then check the motor for worn friction disc plates. Stay clear because the brake piston may be ejected with force (page 136).
Manual Section: Travel Motor Troubleshooting p. 147Swing motor does not run or runs slowly, and swing does not stop or stops slowly
Check the hydraulic components feeding the swing motor first (page 163). Exhaust all trapped hydraulic pressure (page 34), then remove the relief and check valves. Clean contaminated seats, replace damaged or fatigued springs, seat the check valve spring in its proper position and clear any clogged poppet orifice. Capscrews torqued too tightly keep the valves from seating, so torque the relief valve capscrews to 80 ft-lb (108 Nm) per page 160.
Manual Section: Swing Motor Troubleshooting p. 163Frequently Asked Questions
How do I access the diagnostic mode on the Link-Belt 5800?
To access the diagnostic mode, remove the screws (6) securing the switch cover (5) on the right control console (1). Turn the key to the ON position without starting the engine, then press the Change switch once to display the diagnostic readouts on the System Control Monitor. p. 81
What are the torque specs for the main hydraulic pump mounting capscrews on a Link-Belt 5800?
When installing the main hydraulic pump, the capscrews (11) mounting the pump to the engine flywheel housing must be torqued in a criss-cross pattern to 50-55 ft-lb (65-75 Nm). p. 49
What is the procedure for bleeding air from the hydraulic pump?
Clean the air bleed plugs (1,2) with solvent. Loosen the upper air bleed plug (1) and pressurize the hydraulic reservoir with 13 psi (0.9 kg/cm²) of compressed air until air-free oil flows out, then tighten. Repeat this process for the lower air bleed plug (2). p. 50
What is the torque spec for the swing motor mounting capscrews on a Link-Belt 5800 excavator?
When installing the swing motor and reduction gear assembly, apply Loctite® 262 to the mounting capscrew threads and alternately torque the capscrews (14) to 664-774 ft-lb (900-1050 Nm). p. 35
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You can. The PDF is unlocked and carries no copy protection, so print the sections you want and keep the file as your backup.
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