Terex TA30 - Pilot Supply Valve

Section 230-0121
SM 1954 4-00
1
BODY SYSTEM - Pilot Supply Valve
Fig. 1 - Exploded View of Pilot Valve
1 - Valve Body
2 - Spring Cover
3 - 'O' Ring
4 - Control Spring
5 - Spring Guide
SM - 1941
DESCRIPTION
The pilot supply valve can be identified as item 4 in
Section 230-0000, BODY SYSTEM SCHEMATIC.
Mounted off a bracket on the rear right hand cab leg,
the pilot supply valve is located in the hydraulic servo
control lines between the accumulator and the body
control valve. See Fig. 2 for schematic symbol.
The pilot supply valve is a direct acting pressure
reducing valve which steps down the supply pressure
to 30 bar (435 lbf/in²). Intregal of the pilot supply valve
is a relief valve which opens at 45 bar (652 lbf/in²).
6 - Control Spool
7 - Plug
8 - 'O' Ring
9 - Seat
10 - 'O' Ring
11 - Spacer
12 - Pilot
13 - Spring
14 - 'O' Ring
15 - Plug
16 - Plug
17 - 'O' Ring
18 - Adaptor
19 - Plug
20 - Plug
Fig. 2 - Pilot Supply Valve Schematic Symbol
SM - 1871
21 - 'O' Ring
22 - Reducer
23 - Adaptor
24 - Bolt
25 - Lockwasher
26 - Tee Piece
2
3
4
5
6
15
14
13
12
1
16
17
18
19
19
19
11
10
9
8
7
23
26
26
26
23
23
21
22
20
25
24
19
P2P1
T2T1
U1 U2
45 bar (652 lbf/in²)
30 bar (435 lbf/in²)
Courtesy of Machine.Market