SERIES 60 SERVICE MANUAL
1.29.3.1 Cleaning of Model 760, 765, or 770 Jake Brake
Clean the Jake Brake as follows:
NOTE:
Use an OSHA-approved cleaning solvent when washing parts. Be sure to coat parts with
clean engine oil when reinstalling them.
1. Wash the control valves with approved cleaning solvent.
2. Push a wire through the hole in the base of the valve to the distance required to ensure
that the ball check is free.
NOTE:
The ball should lift with light pressure on the wire.
To prevent possible personal injury when using compressed
air, wear adequate eye protection (face plate or safety
glasses) and do not exceed 40 psi (276 kPa) air pressure.
3. Dry the valve with compressed air, and wipe clean with a paper towel.
4. Thoroughly clean the control valve bore in the housing using clean paper towels.
5. Clean slave piston adjusting screw in an approved cleaning solvent.
6. Clean out the solenoid valve bore in the housing.
NOTICE:
Use clean paper towels to clean the solenoid valve bore. Never
use rags, as they may leave lint and residue which can plug the
oil passageways, causing Jake Brake malfunction.
7. Clean the master piston in approved cleaning solvent.
All information subject to change without notice.
6SE483 9901 Copyright © 1999 DETROIT DIESEL CORPORATION From Bulletin 16-60-99 1-541
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