Barreto 1624D - Troubleshooting Guide; Hydraulic System Not Operating; Chain Fails to Rotate

1324D-1624D Owner’s Manual 6/15/18 Page 17 of 19
TROUBLESHOOTING GUIDE
CAUTION!
Always use extreme care when trouble shooting or making adjustments on
trencher. Stay clear of chain and auger when engine is running. Stop
engine before disassembling any component.
A.
Entire hydraulic system does not operate and the engine is not under load
1.
Broken or improperly adjusted
See wheel drive valve cable adjustment
drive valve cable.
and adjust or replace cable.
2.
Low hydraulic oil in tank.
Add oil until it shows in sight gauge.
3.
Hydrostatic pump not primed
Prime the pump.
4.
Hydraulic pump-to-engine coupler
Check for wear and replace both
has slipped.
coupler halves and rubber spider,
as needed.
B.
Chain fails to rotate, but wheels drive.
1.
Chain valve controls or push rod
See digging chain valve adjustment
adjusted improperly.
and adjust controls or push rod.
2.
Chain motor worn.
Rebuild or replace with new motor.
3.
Sheared key on chain shaft.
Replace parts as needed.
4.
Chain valve relief valve not
Check relief valve spring for breakage.
functioning properly.
To set relief valve, remove to hose
from chain control valve. Install a 4000 psi
pressure gauge on the valve port. Start
the engine and manually put the chain
valve lever in the “FORWARD” position.
Adjust the relief valve (on top of the chain
valve) so relief is activated at 3000 psi, or
engine stops.