JLG M400 Service Manual Service Manual - Manual (Page 228)

SECTION 7 - BASIC TROUBLESHOOTING, ELECTRICAL INFORMATION, & SCHEMATICS
7-14 – JLG Lift – 3121827
Brake Drags or runs hot.
Low actuation pressure. Place pressure gauge in bleed port & check pres-
sure with system on.
Bearing failure. Replace bearing.
Brake will not release.
Stuck or clogged valve. Place pressure gauge in bleed port - check for
adequate pressure. Replace defective line or
component.
Bad o-rings. Replace o-rings.
Discs frozen. Replace disc stack.
Table 7-4. Chassis Assembly - Troubleshooting
TROUBLE PROBABLE CAUSE REMEDY