Caterpillar — Final Removal of Detensioning Fittings and Excess Oil
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
- There may be residual pressure; remove the fitting slowly.
- If this step is skipped, major oil seepage through the breather will occur.
Procedure
- Slowly remove the T fittings and straight fittings from the tensioner breather hole over a 5 gallon bucket.
- Use a suction gun to siphon approximately 1 Qt of oil out of the front of each tension cylinder.
- Clean and reinstall the breather.
- Reinstall the breather guard.
- Remove the tractor from the jack stands.
- Refill the air suspension if deflated to 65-90 psi (recommended 75 psi).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Siphon approximately 1 Qt of oil per cylinder
- Air suspension 65-90 FridayParts $13.13 psi; recommended 75 psi
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.