Air System Components; Description - Manitowoc Grove TMS800E Service And Maintenance Manual

UNDERCARRIAGE
pressure in the secondary system should not drop below
6.89 bar (100 psi).
7. Continue draining the primary reservoirs to zero (0) psi.
8. Apply the service brakes.
9. All four front axle brakes and the four rear axle spring
brakes should apply. The brake lights on the rear of the
crane should illuminate.
10. On units equipped with trailing boom, the trailer supply
line should not be evacuated.
11. Release the service brakes.
Loss of Secondary (Front) Air System
1. If necessary, start the engine and charge air system to
governor cut-out pressure.
2. Turn engine off and allow the air pressure to stabilize for
one minute.
3. Release the park brakes by pushing the yellow button on
the front console. On units equipped with trailing boom,
push the yellow button and the red button. Ensure the
dummy glad hand is installed on the trailer supply and
control disconnects before pushing red button.
4. Check that all wheels turn freely.
5. Simulate a full air leak by opening the drain valve in one
of the two secondary reservoirs.
6. The Low Air Pressure indicator and warning buzzer
should come on when the air pressure in the secondary
system drops below 5.17 ± 0.35 bar (75 ± 5 psi). Air
pressure in the primary system should not drop below
6.89 bar (100 psi).
7. Continue draining the secondary reservoirs to zero (0)
psi.
8. Apply the service brakes.
9. All four rear axle brakes should apply. The brake lights
on the rear of the crane should illuminate.
10. On units equipped with trailing boom, the trailer supply
line should not be evacuated.
8-50
11. Release the service brakes.
Emergency Brake Application
1. If necessary, start the engine and charge air system to
governor cut-out pressure.
2. Turn engine off and allow the air pressure to stabilize for
one minute.
3. Release the park brakes by pushing the yellow knob on
the front console.
4. Check that all wheels turn freely.
5. Simulate a full air leak by opening the drain valve in one
of the two secondary reservoirs.
6. Slowly drain the primary reservoirs.
7. The yellow knob should automatically "pop" out when
the pressure decreases below 1.38 to 2.07 bar (20 to
30 psi).
8. On units equipped with trailing boom, the trailer
emergency supply line should be exhausted between
1.38 to 3.10 bar (20 to 45 psi).

AIR SYSTEM COMPONENTS

Description

Air Compressor
The air compressor (Figure 8-68) is mounted on and driven
by the engine. It provides the source of compressed air for
the operation of the air system components. It is controlled
(cycled on and off) by an air governor.
Air Governor
The air governor is mounted on the air dryer behind the front
bumper under the center decking. The governor senses the
system pressure and when pressure reaches 8.96 bar (130
psi) the governor vents the compressor. When pressure
drops to 7.58 bar (110 psi), the governor signals the
compressor to start charging again.*
Published 01-29-2014, Control # 496-00
TMS800E SERVICE MANUAL