Hydraulics are the hard part of any telehandler, and they fill nearly half of this Skytrak 6034 maintenance manual PDF: 36 factory pages, OEM ID 8990090, covering all four variants in the 5030 and 6034 family. Cylinder bleed procedures for the fork leveling and tilt circuits run right into pressure checks on the main relief and stabilization valves, and the schematics show how the front assist system routes oil to the wheel motors. Service intervals from 10 through 1200 hours sit beside the engine work: valve clearance, injection pump timing, fuel system bleeding. Set the main relief at 1800 PSI and the front assist system at 3000 PSI, then torque the tie rod jam nuts to 180-200 lbs. ft. Fork tilt that creeps under load burns your afternoon. Bookmarked and text-searchable, this PDF puts the hydraulic troubleshooting chart two clicks from wherever you open it.
What's Inside This Skytrak 5030, 6034, 5030-2, 6034-2 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Maintenance | 3 | General, Preventive Maintenance, Maintenance Lubrication Chart |
| Lubricating and Maintenance Points | 4 | Stabilizer Cylinders, Steering Cylinders, Boom Cylinder |
| Operator Service | 5 | 10 Hours, 50 Hours, 300 Hours |
| Engine Maintenance | 6 | Engine Oil Filter, Dipstick and Drain Plug, Draining the Filter |
| Bleeding the Fuel System | 7 | Fuel Filter, Fuel Injection Pump, Injector Lines |
| Transmission Maintenance | 8-9 | Checking Transmission Oil, Changing Transmission Oil, Rear Axle, Changing Rear Axle Oil |
| Cooling System | 10 | Checking Coolant Level, Draining the Cooling System, Checking Electrolyte Level |
| Engine Valve Clearance | 11 | Checking and Adjusting Valve Clearance, Fuel Injection System, Engine Speed Adjustment |
| Battery and Tires | 12 | Battery, Tires, Front Wheel Bearings |
| Injection Pump Timing | 13 | Rear Cover Plate Timing Inspection Hole, In-Line Injection Pump Timing Mark, In-Line Injection Pump Adjustment Bolts |
| Fan Belt and Thermostat | 14 | Engine Thermostats, Fan Belt, To Adjust Belt Tension |
| Fuel Injector Removal | 15-16 | Changing Injection Pump Oil, Fuel Injector Removal and Installation, Diesel Engine Speed Adjustments |
| Specifications | 17 | Capacities, Electrical, Filters |
| Hydraulic System and Cylinders | 18-24 | Hydraulic Cylinders, Fork Leveling and Tilt Cylinder Bleed, Fork Leveling Slave Cylinders, Boom Cylinder, Pressure Checks and Adjustments, Main Relief Valve, Control Valve Seals and Springs |
| Front Assist Drive System | 25-28 | Pump Pressure Check, Relief Valve, Wheel Motor Check, Front Assist Control Valve Check, Torque Hub, Disengaging Front Wheels |
| Boom Rollers, Wheels and Cold Start | 29-32 | Boom Roller Adjustment, Tire Changes, Hydro-Flation Procedure, Front Wheel Toe-In, Diesel Cold Start Installation, Structural Repairs |
| Troubleshooting | 33-36 | Fork Tilt Operation, Stabilization System, Trak International |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tie rod jam nut torque | 180-200 lbs. ft. | p. 31 |
| Intake Valve Clearance | 0.014 in. - 0.016 in. | p. 11 |
| Exhaust Valve Clearance | 0.017 in. - 0.019 in. | p. 11 |
| Main System Relief Pressure | 1800 PSI | p. 22 |
| Front Assist System Pressure | 3000 PSI | p. 25 |
| Engine Oil Change Interval | 300 hours | p. 5 |
| Hydraulic Oil Filter Change Interval | 600 hours | p. 3 |
| Rear Axle Oil Change Interval | 1200 hours | p. 9 |
Skytrak 5030, 6034, 5030-2, 6034-2 Common Problems This Manual Covers
SkyTrak 5030 boom slow and jerky, hydraulics sluggish, pump whining under load
Check hydraulic oil level and inspect the suction line for collapse before blaming the pump. Test main relief pressure per the procedure on page 22 and adjust to 1800 PSI. If pressure checks good, work through the sluggish operation chart in the troubleshooting section, and replace the hydraulic oil filter if it is past the 600 hour interval.
Manual Section: Hydraulic System Troubleshooting p. 33Stabilizer cylinders won't lock when boom is extended, rear end drifts on uneven ground
Check the stabilization troubleshooting chart on page 33 for the cylinders-not-locking condition. Inspect the solenoid valve wiring and connectors for corrosion, then test the solenoid cartridge for proper shift. Verify main system pressure reaches 1800 PSI at the relief valve; low pressure will keep the lock circuit from seating.
Manual Section: Stabilization System Troubleshooting p. 33Engine hard to start, down on power with rough idle at high hours
Check valve lash with the engine cold: set intake clearance to 0.014-0.016 in. and exhaust to 0.017-0.019 in. using the procedure on page 11. If the machine ran out of fuel or the filter was just changed, bleed the fuel system at the filter, injection pump, and injector lines per page 7 before cranking again.
Manual Section: Engine Valve Clearance p. 11Front assist drive weak, front wheels not pulling in mud or on grades
Test front assist pump pressure first; the system should develop 3000 PSI, with the check procedure starting on page 25. If pump pressure is good, check the control valve for proper shift, then test each wheel motor for internal bypass. Follow the pump, valve, and motor checks in order rather than swapping parts on a guess.
Manual Section: Front Assist System Troubleshooting p. 25Steering feels loose at road speed, front end wanders and clunks over rough ground
Inspect tie rod ends for play with the wheels on the ground and a helper rocking the steering wheel. Torque the tie rod jam nuts to 180-200 lbs. ft. per the spec on page 31. Check front wheel bearing and brake adjustment on page 12, then grease the steering cylinder pivots at the fittings shown on page 4.
Manual Section: Hydraulic System p. 31Frequently Asked Questions
What are the torque specs for the tie rod jam nuts on the Skytrak 5030, 6034, 5030-2, 6034-2 telehandlers?
To adjust the front wheel toe-in, loosen the jam nut at each end of the tie rod and turn the rod as required. Once the correct toe-in is achieved, tighten the jam nuts to a torque of 180-200 lbs. ft. p. 31
What are the replacement specifications for the air cleaner elements on the Skytrak 5030, 6034, 5030-2, 6034-2?
The part number for the outer air cleaner element is 8825161, and the part number for the inner air cleaner element is 8825162. p. 17
What is the engine valve clearance setting for the intake and exhaust valves on a Skytrak 5030, 6034, 5030-2, 6034-2?
The intake valve clearance should be 0.014 in. go to 0.016 in. no-go (0.356mm to 0.406mm). The exhaust valve clearance should be 0.017 in. go to 0.019 in. no-go (0.432mm to 0.483mm). p. 11
What is the required engine oil capacity for the SkyTrak 5030/6034 with a filter change?
The engine crankcase capacity with a filter change is 9.0 U.S. quarts. p. 17
How often should the engine oil and filter be changed?
The engine oil and filter should be changed every 300 hours of operation. p. 5
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