Tadano TR-800XXL4, Service Manual

Page: 279 / 402

T - 3 T - 3
Brake Valve
14
W202-0013E
3. The mount plate incorporates an oilless alloy bush.
Wash it with kerosene and dry it with compressed
air.
5.2 Checking
1. Check the parts for cracks, deformation, etc., and
check the sliding surfaces for dents; replace any
faulty parts.
2. Examine the springs for corrosion, and replace if
faulty.
6. Reassembly
[NOTICE]
Apply lithium base grease (Idemitsu Daphne
Coronex Grease EP2, or equivalent) to the valve
sliding surface, body sliding surface, and the relay
piston sliding surface.
When inserting O-rings, be sure to apply lithium
base grease to them, (Idemitsu Daphne Coronex
Grease EP2) and fill the O-ring groove with grease
in advance.
Apply lithium base grease containing MoS
2
(bearing
grease No.3 by Nippon Molybdenum, or equivalent)
to the sliding surfaces of the plunger, and to the
roller and fulcrums.
6.1 Reassembly of the secondary side
1. Place lower valve on the work bench with the
valve seal side down; install valve retainer, valve
spring, retainer with O-rings, and special washer,
and secure with retaining ring.
IW202-0010E16
Lower valve assy
Retaining ring
Special washer
O-ring
Retainer
Valve spring
Valve retainer
Lower valve
2. Build the lower valve assy into lower body.
3. Install exhaust cover, and secure with screw and
washers. Pack grease in the groove in the surface
of lower body which mates with upper body; install
O-ring coated with grease.
IW202-0010E18
Lower body
Lower valve assy
Exhaust cover
O-ring
Screw
6.2 Reassembly of the primary side
1. Place the upper valve on the work bench with the
valve seat side down.
2. Install the valve retainer, valve spring, retainer
with 2 O-rings, and special washer in sequence.
Secure these parts with the retaining ring.
[NOTICE]
Apply grease to the O-ring.
IW202-0010E15
Upper valve assy
Retaining ring
Special washer
O-ring
Retainer
Valve spring
Valve retainer
Upper valve