Manitowoc Grove TMS700E Service And Maintenance Manual page 311

TMS700E SERVICE MANUAL
Double Check Valve
Removal
1. Chock the wheels and completely depressurize both air
systems.
2. Tag and disconnect the air lines connected to the double
check valve.
3. Remove the two nuts and washers securing the valve to
the frame and remove the valve
Disassembly
1. Remove the end caps, O-rings, shuttle, and shuttle
guide.
Cleaning
1. Clean metal parts in a cleaning solvent and inspect for
cracks, wear, or deterioration. Replace all parts not
considered serviceable.
2. Replace all rubber parts.
Assembly
1. Install the shuttle guide, shuttle, O-rings, and end caps.
Installation
1. Position valve on mounting studs on frame and secure
with two nuts and washers.
2. Connect the air lines as per removal tags.
Operating Check
1. Connect two separately controlled air lines to the inlet
ports and a pressure gauge to the outlet port.
2. Apply and release air to one of the inlet ports and
observe that the gauge registers the pressure.
3. Repeat with the other line. Keep in mind that the outlet
gauge will register pressure from the highest pressure
line.
Leak Test
1. Disconnect one inlet port and apply a soap solution.
2. Apply air to the other inlet port and observe for bubbles.
A 25 mm (1 in) bubble in five seconds is permissible.
3. Do the same to the other side. Replace any valve that
does not function properly.
Preventive Maintenance
Every 3600 hours, 160,000 km (100,000 mi), or yearly
remove disassemble, clean, and inspect the valve.
Grove
Relay Valve
Completely depressurize all reservoirs before removing
the insert.
The inlet/exhaust valve assembly can be replaced without
removing the valve. Replacement is as follows:
1. Remove the snap ring/exhaust cover assembly.
2. Pull the insert out and replace.
3. Reinstall the exhaust cover and snap ring.
Removal
1. Chock the wheels and completely depressurize both air
systems.
2. Tag and disconnect all air lines connected to the relay
valve.
3. Remove the two nuts and washers securing the valve to
the frame and remove the valve.
Inspection
Inspect all air lines for kinks, cuts, chafing, or deterioration.
Replace lines showing these defects.
Installation
1. Position the valve on the mounting studs on the frame
and secure with two nuts and washers.
2. Connect the air lines as per removal tags.
3. Check operation as described under Operating and
Leakage Tests.
Operating Test
1. Chock the wheels and pressurize both systems. Adjust
the brakes.
2. Apply and release the brakes several times and check
for prompt response of the brakes at all wheels.
Leakage Test
1. With dual brake valve released, coat the relay valve
exhaust port with a soap solution to check for inlet valve
and O-ring leakage. A 25 mm (1 in) bubble in five
seconds is permissible.
2. With the dual brake valve applied, check the relay valve
exhaust port for leakage of the exhaust valve.
3. Apply a soap solution around where the relay valve
cover and body meet to check for seal ring leakage. A 25
mm (1 in) bubble in five seconds is permissible.
Published 01-29-2015, Control # 512-01
UNDERCARRIAGE
CAUTION
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