Caterpillar — Track Detensioning - Mechanical Spring Only
Maintenance · Tension cylinder
From a Caterpillar service manual covering: Challenger 65, Challenger 70, Challenger 75, Challenger 85, Challenger 95. Check it applies to your exact model before use.
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Before you start
- Use care and loosen fittings slowly; oil is under low pressure and could spray out.
- Applies to Challenger 65, 65B (S/N 7YC), 75 (S/N 4CJ).
Procedure
- Loosen the fitting slowly to relieve pressure and drain oil into a bucket.
- Leave the rear section of the crossover hose connected and in the oil bucket.
- Loosen the locknut on the ORFS fitting and back the elbow out of the tension cylinder, keeping the O-ring.
- Repeat for the opposite side.
- Install the correct adapter fitting with O-ring into each tension cylinder.
- Install the single end detensioning hose into the RH cylinder and the T fitting into the LH cylinder.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Caterpillar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.