Manitowoc Grove TMS700E Service And Maintenance Manual page 310

UNDERCARRIAGE
Cleaning
1. Clean all metal parts in cleaning solvent.
2. Wipe clean all rubber parts and replace the filter if
clogged.
NOTE: Do not reinstall the valve without a clean filter.
3. Replace all worn parts.
Assembly
1. Apply a light film of grease on the inlet valve seat.
NOTE: Do not oil the inlet/exhaust valve.
2. Place the sealing ring in the groove of the cover.
3. Place the valve guide over the inlet/exhaust valve. The
wire will project through the exhaust port.
4. Place the body on the cover and install the capscrews
and lockwashers.
5. Install the filter and adapter. Screw in the filter retainer.
6. Install the adapter and filter assembly in the body and
tighten.
Installation
1. Clean and flush the reservoir to prevent clogging of the
drain valve filter.
2. Aerate the reservoir thoroughly if any solvents have
been used to clean the reservoir.
3. Install the drain valve in the bottom port of the reservoir
and tighten.
Preventive Maintenance
Every 1800 hrs, 80,000 km (50,000 mi) or 6 months remove,
inspect, and clean the drain valve as described above.
Operating Leaks and Checks
Slightly depressurize the tank several times and check if air
is exhausted through the drain valve exhaust port. If no air is
exhausted, push up on the wire stem. If no air is exhausted,
the filter is plugged. Remove the drain valve and clean the
filter.
NOTE: Excessive leaking of the air system could result in
constant exhausting of the drain valve.
Replace the drain valve if the valve does not function as
described above.
8-58
Pressure Protection Valve
Removal
1. Chock the wheels and completely depressurize both air
systems.
2. Tag and disconnect the two air lines from the pressure
protection valve and remove the capscrews, nuts and
washers securing the valve to the mounting studs.
NOTE:
3. Tag and disconnect the air lines from the valve. Unscrew
the valve from the auxiliary air reservoir.
Installation
1. Install the valve on the mounting studs and secure with
capscrews, nuts and washers or screw the valve into the
auxiliary air reservoir.
2. Connect the air lines as per removal tags.
Operational Check
NOTE:
1. Install a pressure gauge and drain valve at both the
supply and delivery sides of the pressure protection
valve.
2. Pressurize the system and shut off the engine.
3. Slowly exhaust the delivery side of the valve. The gauge
on the supply side should stop while the gauge on the
delivery side should continue to show a pressure loss.
The closing pressure should be 5.90 ±0.35 bar
(85 ±5 psi).
Leakage Test
1. Apply a soap solution around the cap of the valve with
the system pressurized and observe for bubbles. A 25
mm (1 in) b ubble in three second s or lon ger is
acceptable.
2. Disconnect the air line on the delivery side of the valve
and apply a soap solution to the delivery port. A 25 mm
(1 in) bubble in five seconds or more is acceptable.
Preventive Maintenance
Every 900 hrs, 40,000 km (25,000 mi) or 3 months check for
operation and leakage as described above.
Published 01-29-2015, Control # 512-01
TMS700E SERVICE MANUAL
Step 3 is applicable to the pressure protection
valve for the auxiliary air circuit.
Replace any pressure protection valve that does
not operate properly.