Service Manual

627333-A 8-9
Air Dryer
AIR DRYER
DESCRIPTION
The air dryer is plumbed from the compressor to the
wet tank and is mounted in front of the coolers. The
dryer can be identified by a small regeneration hole in
the back of the inlet port, which is visible when the
fitting is removed. The dryer uses a 12-volt heater. The
heater turns on at 7 degrees C (45 degrees F) and off
at 30 degrees C (86 degrees F).
Minimum governor cut-out pressure is 793 kPa (115
psi). Maximum system pressure is 1034 kPa (150 psi).
Minimum pressure after regeneration is 724 kPa (105
psi). Dryer includes one spin-on desiccant canister.
FIG. 1: Air dryer (1) located
AIR DRYER REMOVAL
FIG. 2: Air dryer/Governor hose attachment.
m
WARNING: To prevent serious eye injury,
always wear safe eye protection when
you perform machine maintenance or
service. Remove all pressure from the air
system before you disconnect any
component, including the desiccant
cartridge. Pressurized air can cause
serious personal injury.
Mark and disconnect output hose (1) to wet air tank.
Disconnect braided hose (2) from air compressor.
Disconnect signal hose (3) to governor from wet tank.
Disconnect clear vinyl hose (4) from purge valve.
Unplug wiring connector for heater.
Loosen and remove three bolts that hold air dryer to
chassis and remove air dryer.
Disassemble air governor (5) from air dryer.
FIG. 1
1
q000178s
FIG. 2
M6215007
4
3
2
1
5