A: Both problems are usually caused by the failure of the forward clutch pack. If the drive is poor in forward it could be that the clutch pack has failed for either 1 of 2 reasons.
1) The torque convertor has failed & not allowed enough 'slip' to occur - when the loader is driven into a pile of dirt, not enough 'slip' or too much stall occurs & the forward clutch pack is eventually burnt out.
2) The belville washer in the forward pack breaks into pieces (due to heat or excessive clearances caused by worn plates) - this often causes the forward pack to sometimes lock up permanently, so when reverse is selected the transmission locks up trying to drive in forward & reverse at the same time.
Q: I don't seem to have enough pushing power?
A: Here you need to ascertain whether the problem is engine power or transmission slipping. A 'Stall Test' needs to be carried out to test the engine against the hydraulics & the transmission, to test the engine under different loads.
580/590 SLE;SM;SR POWERSHIFT (Clark)
Q: Why does my transmission not go into gear when cold & then once engaged be OK all day?
Why does my transmission hesitate between forward & reverse?
A: This is caused by excessive clearances in clutch packs due to worn plates & can only be repaired by overhauling.
Q: My transmission will not go into gear?
A: The powershift transmission is controlled by electrics/hydraulics/mechanical drive.
Most times here the problem lies in the electrics
Check - fuses & relays
- are lights flashing on LED readout? Take note of what they are - they are codes to assist diagnosis
- wiring continuity to control valve & shorts to ground
- FNR controller
- coil / solonoid resistance at transmission control valve
580 LE:M - SHUTTLESHIFT (Carraro)
Q: My transmission will not go into gear?
A: Shuttleshift is also controlled by electric/hydraulic/mechanical drive.
Check - fuses & relays
- solonoids on top of transmission clicking when FNR lever is moved
- wiring continuity to solonoids at transmission control valve
- modulator operation in transmission control valve.
Carraro 4wd Front Axles
Q: The king pin bearings have collapsed & worn the axle housing - Can it be repaired?
A: In most instances, YES ! Using the correct procedure ductile iron can be welded. We have carried out many "on-site" repairs to keep machines going that have lasted a number of years. For the guaranteed perfect job, workshop repairs can also be carried out - depending on time & your budget.
580/590 SLE;SM; - EC CUMMINS ENGINE
Q: Why does my engine start & then stop when I let go of the key?
A: The Cummins EC engines have an 'in-line' Bosch injector pump. The fuel shut off solonoid located behind the injector pump is probably at fault.
There are 2 coils built into this solonoid 1) a high energy one which pulls the stop lever - during 'start' & 2) a low energy one which then holds it in the run position.
580/590 K;SK;LE;SL;SLE;M;SM - HYDRAULICS
Q: I have an oil leak around the swing cylinders I just can't seem to find?
A: The closed end of each cylinder (at the back) has a welded 'cap'. Look closely at this area & you may likely find it to be cracked.
To effectively repair these cracks the cylinders must be removed & stripped, the original weld completely removed & then the cylinder rewelded.
Q: The slew won't slow down when I swing full left or right?
A: There is a roller which runs on a cam plate on the top pin of the swing tower. Check to see if it has any flat spots on it - they sometimes seize & need replacing. That small amount of wear, is enough to upset smooth operation of the backhoe. Adjustments to the cam lever may be needed - make small adjustments (1/4 of a turn) in between testing.
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