Komatsu FD160E-7 User Manual

DISASSEMBLY AND ASSEMBLY CONTROL VALVE
EX20 Series 40-73
CONTROL VALVE
DISASSEMBLY AND ASSEMBLY
This section describes disassembling and assembling
procedures of the representative 3-port relief model.
When disassembling or assembling work varies accord-
ing to the number of port reliefs or their presence/
absence, additional instructions are given in [ ].
Disassembling and assembling units should be con-
ducted at the manufacturer's factory in principle. If this is
impossible, ask a service shop with in-depth knowledge
of hydraulic machines for the disassembling/assembling
work. Since precision-made hydraulic machines form
many small gaps inside, conduct disassembly and
assembly in the following procedures, while paying atten-
tion to the handling of the machine in a clean, dust-free
place. Do not hit any part even if it does not work
smoothly.
NECESSARY TOOLS
• Hexagon key wrench
(width across flats: 4, 5, 6, 8, 12 mm)
• Spanner (width across flats: 10, 24, 27, 32 mm)
• Torque wrench
• Scriber
• Vice
DISASSEMBLY
1. Spool
1) Remove two hexagonal socket head bolts (40)
using an 8 mm hexagon key wrench. [This work
is required for all port reliefs.]
2) Remove cap (3) and O-ring (51). [This work is
required for all port reliefs.]
3) Pull out lift spool (27) from body (37) with parts
(26), (28) and (41) united.
4) Pull out tilt spool (31) in the same way.
5) Pull out spool (29) in the same way.
[Dual-port relief model: not necessary, 4/5-port
relief model: in the same way]
ÅöSince clearance is controlled for body (37)
and spool (29), check the combination of spool
when disassembling, and reassemble it at its
original position.
2. Spool assembly
1) Detach button bolt (41) from lift spool (27) using
a 6 mm hexagon key wrench.
2) Remove spring (26) and spring holder (28).
3) Detach button bolt (41) from tilt spool (31) using
a 6 mm hexagon key wrench.
4) Remove spring (26) and spring holder (28).
5) Remove head spool (20) using a 10 mm span-
ner.
6) Remove O-ring (53) using a scriber.
7) Pull out spring (22) and plunger (21).
8) Since orifice (24) is caulked, it cannot be disas-
sembled.
9) Detach button bolt (41) from spool (29) using a 6
mm hexagon key wrench.
[Dual-port relief model: not necessary, 4/5-port
relief model: in the same way]
10) Remove spring (26) and spring holder (28).
3. Main relief assembly
1) Remove sleeve (33) as an assembly using a 24
mm spanner, while holding cap nut (5) and lock-
nut (7) to prevent the set pressure from varying.
Do not disassemble the main relief. It has
been set to the specified pressure.
4. Port relief assembly
1) Remove pilot sleeve (16) as an assembly using
a 27 mm spanner, while holding cover (17) to
prevent the set pressure from varying.
Do not disassemble the port relief. It has
been set to the specified pressure.

Komatsu FD160E-7 Specifications

General

Brand	Komatsu
Model	FD160E-7
Category	Forklifts
Language	English