55 - 9
Dismantling and Assembly
Loader Lift Spool
The numerical sequence shown on the illustration is
intended as a guide to dismantling.
For assembly the sequence should be reversed.
The following points MUST be avoided when dismantling
and assembling the valve:
•
CONTAMINATION
•
DAMAGE TO SPOOL
•
DAMAGE TO SEAL GROOVES
All or any of the above points may result in possible
problems with the valve.
Dismantling
Remove tie rod nuts
1
and end cover
2
. Separate the valve
sections
3
take care not to lose shims
5
. Remove and
discard ‘O’ rings
4
.
When removing ' O' rings and seals, use an appropriately
rounded tool that WILL NOT cause any damage to the spool
or seal grooves.
Care must be taken to ensure that the spool
18
is not
damaged when removing it from the valve block.
Hold the spool in a suitable clamp, use a punch to separate
detent shaft
19
from coupling
20
. Unscrew coupling
20
and
remove spring
22
, spacer
23
and cups
21
and
24
.
Use a suitable press to compress spring
14
and remove
retaining ring
12
. Take care not to lose detent balls
16
.
Assembly
Renew all 'O' rings and back-up rings.
When fitting coupling
20
, clean the threads then apply a
small quantity of JCB Threadlocker & Sealer to the threads
of the spool.
When fitting spool seals
26
and
27
refer to the procedure
Fitting Spool Seal
.
ALWAYS fit three shim (item
5
) in between each valve block
section as shown.
Run the engine and inspect the valve for external leaks.
Torque Settings
Item
Nm
kgf m
lbf ft
1
41
4.1
30
6
6
0.55
4
10
8
0.8
6
20
8
0.8
6
28
13.5
1.38
10
29
13.5
1.38
10
31
67
6.9
50
Item
Description
1
Tie rod nuts
2
End cover
3
Valve section
4
O-ring
5
Shim
6
Bolt
7
Dust boot
8
Dust guard
9
Seal
10
Capscrew
11
Detent housing
12
Retaining ring
13
Retainer
14
Spring
15
Piston
16
Detent balls
17
Washer
18
Spool assembly
19
Detent shaft
20
Pivot coupling
21
Spring cup
22
Spring
23
Spacer
24
Spring cup
25
O-ring
26
O-ring
27
O-ring
28
Primary shuttle housing
29
Shuttle plug assembly
30
Ball bearing
31
Plug
32
O-ring
33
Spring
34
Poppet
Section E
9803/3280
Section E
55 - 9
Issue 1
Loader Valve - Variable Flow
