WABCO 1200E, Руководство по обслуживанию

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2 Component Removal and Installation
15
Meritor WABCO Maintenance Manual 34 (Revised 03-16)
NOTE: When replacing air dryer components, use only Meritor
WABCO replacement parts.
The exploded view of the air dryer in Section 1 shows the location of
the various air dryer components.
Component Removal and Installation
Desiccant Cartridge
NOTE: Replacement cartridges are marked “System Saver
Series.”
1. Replacement kit contains one cartridge and one O-ring.
Figure 2.1.
Figure 2.1
2. Loosen and remove the old cartridge. Use strap wrench if
necessary.
3. Remove and discard O-ring from dryer base.
Turbo Cut-Off Valve Air compressor stuck pumping, TCU remains
open. System will build pressure until safety
valve opens in system. Signal line loss.
Air flows from purge valve during compressor
unload cycle after purge cycle, and flow is
noticeably stronger at high engine RPM,
especially under load. Turbo cut-off valve leaking.
No pressure build-up in system — high
compressor discharge line pressure. Valve stuck in closed position.
Regeneration Valve Regeneration cycle continues after compressor
begins, and secondary tank pressure drops 15
psi (103 kPa) or more. Regeneration valve allowing too much air to come
back into cartridge.
Purge cycle is too short (five seconds or less) —
pressure-controlled check valve is O.K., no leak
in governor control line. Regeneration valve not allowing enough air to come
back into cartridge.
Air dryer purges — but no regeneration, no
check valve between air dryer and supply tank,
and purge valve has not closed. Regeneration valve not allowing any air to come back
into cartridge.
Pressure-Controlled Check
Valve Regeneration cycle too short; may result in
water in tank. Valve checks (stops airflow) too high.
Replacement Requirements
Component When to Replace Why
Figure 2.1
1002163b
1800
1200