John Deere CD4039DF008 - Manual (Page 52)

Maintenance/1000 hours/1 year
DPSG,CD03523,32 –19–12JUL99–1/1
CLEANING CRANKCASE VENT TUBE
CD30773
–UN–27AUG99
If you operate the engine in dusty conditions, clean the
tube at shorter intervals.
1. Remove and clean crankcase vent tube (A).
2. Install the vent tube. Be sure the O-ring fits correctly in
the rocker arm cover bore for elbow adapter. Tighten
hose clamp securely.
DPSG,CD03523,33 –19–12JUL99–1/2
CHECKING AIR INTAKE SYSTEM
CD30762
–UN–27AUG99
IMPORTANT: The air intake system must not leak.
Any leak, no matter how small, may
result in engine failure due to
abrasive dirt and dust entering the
intake system.
1. Inspect all intake hoses (piping) for cracks. Replace
as necessary.
2. Check clamps on piping (A) which connect the air
filter, engine and, if present, turbocharger and
air-to-air radiator. Tighten clamps as necessary.
3. Test air restriction indicator (B) for proper operation.
Replace indicator as necessary.
35-1
112699
PN=52
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