Table 2-1. Preventive Maintenance Checks and Services for Model M992A1
Not Fully Mission
Lubricant is under high pressure.
Loosen bleed plug slowly to avoid
injury to personnel.
When measurement has reached
3 1/2 inches (8.89 cm), track
adjuster cylinder assembly has
reached its maximum limit.
Remove one track shoe and
readjust track tension.
If track sag cannot be taken up,
decrease track tension; remove
track shoe and adjust.
To decrease track tension, open
bleed plug on track adjuster cylinder
assembly and reduce pressure until
tension is released.
b. Tighten bleed plug and wipe
away excess grease.