8-55
TMS800E SERVICE MANUAL UNDERCARRIAGE
Published 01-29-2014, Control # 496-00
Maintenance
NOTE: For more in depth information on Bendix system
components go to the Bendix website and
download the appropriate document: Bendix
Service Literature.
Air Compressor
NOTE: Detailed maintenance instructions for the air
compressor are contained in the Engine Service
Manual.
Removal
1. Chock the wheels and depressurize both primary and
secondary air circuits.
2. Open the engine compartment to gain access to the air
compressor.
3. Disconnect and tag the air lines connected to the air
compressor.
4. Unbolt and remove the compressor from the engine.
Installation
1. Bolt the air compressor to the engine. Refer to engine
manual for appropriate torque.
2. Connect air lines as tagged during removal.
Air Governor
Removal
1. Chock the wheels and depressurize both primary and
secondary air circuits.
2. Disconnect the air line from the governor.
3. Remove the bolts, lockwashers and nuts securing the air
governor to the air dryer module. Remove the air
governor.
Installation
1. Position the air governor on the air dryer module and
secure with bolts, lockwashers, and nuts.
2. Connect the air line to the governor.
Operational Test
Start the engine and pressurize the system. Check the
governor cut-out pressure with either the panel gauge or a
test gauge 8.96 bar (130 psi). At the cut-out pressure, the
compressor is unloaded and the air dryer is purged.
Leakage Test
1. Leakage checks on the governor are made at the
exhaust port with a soap solution in both the cut-in and
cut-out positions. In the cut-in position, the leakage can
be through either the inlet valve or bottom piston
grommet. In the cut-out position, leakage can be through
the exhaust valve seat or upper piston grommet. The
soap solution test on the exhaust port is done to verify a
leak and determine its location.
2. If the governor does not function properly or has
excessive leakage, repair or replace the air governor.
Check the applicable Grove Parts Manual.
Air Dryer
Removal
1. Turn ignition switch off.
2. Turn the battery disconnect switch in the battery
compartment to the OFF position.
3. Chock the wheels and completely depressurize the air
system.
4. Tag and disconnect all air and electrical lines connected
to the air dryer.
5. Remove the capscrews and washers securing the dryer
to the carrier frame and remove the dryer.
6. If the dryer is to be replaced with a new one, remove the
fittings from the old dryer.
Installation
1. Install the fittings on the new dryer.
2. Position the air dryer on the carrier frame and secure
with the capscrews and washers. Torque the capscrews.
Refer to Fasteners and Torque Values, page 1-13.
3. Connect the air and electrical lines as tagged during
removal. Run the lines downhill so that pockets of water
don’t collect in the lines and freeze.
Preventive Maintenance
The recommended desiccant cartridge change is 3 years but
can be shorter or longer depending on conditions.
1. Every 900 hours, or 40,000 km (25,000 mi) check for
moisture in the air system by opening the reservoir’s
drain cock or automatic drain valve.
2. Replacement of the desiccant cartridge may be
necessary if moisture is present; however, the following
WARNING
Death or injury could occur!
Depressurize both air systems completely before
disconnecting air lines or components.
Reference Only
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