Troubleshooting
Problem
Possible Cause
Corrective Action
1. A hydraulic coupler is not completely
connected.
1. Check and tighten all couplers.
2. A hydraulic coupler is damaged.
2. Check/replace couplers
3. There is an obstruction in a hydraulic
hose
3. Find and remove the obstruction.
4. An auxiliary valve on the traction unit
is not opening.
4. Repair the valve.
5. The boom end bearing failed.
5. Replace the bearing.
6. The digging chain is too tight.
6. Adjust the digging chain.
7. There is sand buildup in tooth root of
the drive sprocket.
7. Raise the trencher and run the chain
backwards, then reduce the chain
tension.
The chain does not turn.
8. Hydraulic motor or chain drive failure
8. Contact your Authorized Service
Dealer.
1. Worn teeth
1. Replace any worn teeth.
2. Wrong setting on flow divider and
speed lever (applicable wheeled units
only)
2. Set the flow divider to the 10:00
position and the speed lever to the
turtle position.
3. There is a restriction in a quick coupler
or hose.
3. Check the hoses and couplers and
repair any problems found.
4. The hydraulic system is too hot.
4. Shutdown and allow the system to cool.
The trencher does not dig fast enough.
5. The relief valve is set below
specifications.
5. Contact your Authorized Service
Dealer.
1. The auxiliary valve lever is in the wrong
position.
1. Move the auxiliary valve lever to the
rearward position.
The chain turns in the wrong direction
2. The hydraulic hoses are reversed.
2. Disconnect hoses and switch positions.
1. The fill plug is leaking.
1. Look for moisture around the fill plug.
If present, change the oil, and replace
the plug and the plug o-ring.
2. O-ring failure on the motor.
2. Contact your Authorized Service
Dealer.
The bearing case lube is contaminated.
3. Seal failure.
3. Contact your Authorized Service
Dealer.
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