SERVICE REPAIR
S100FTBCS S120FTS S120FTPRS [G004]
2000 SRM 1137
General
General
This section contains a description and repair pro-
cedures for both manual and electronic main control
valves used in the hydraulic system for this series of
lift trucks.
There are two main control valves available for this
series of lift trucks. One is controlled manually (man-
ual main control valve) and the other is controlled
electronically (electro-hydraulic main control valve).
The main control valves are mounted to the cowl us-
ing three mounting bolts. See Figure 1.
NOTE: MAJOR COMPONENTS NOT SHOWN FOR
CLARITY. VIEW IS FROM THE FRONT.
NOTE: ELECTRO-HYDRAULIC CONTROL VALVE
FOR LIFT TRUCK MODELS S30FT, S35FT, S40FTS
(E010), H1.6FT, H1.8FT, H2.0FTS (H30FT, H35FT,
H40FTS) (F001), S2.0-3.5FT (S40-70FT, S55FTS)
(F187), H2.0-3.5FT (H40-70FT) (L177), S4.0, 4.5,
5.5FT, S5.5FTS (S80, 100, 120FT; S80, 100FTBCS;
S120FTS; S120FTPRS) (G004), AND H4.0FT5/FT6;
H4.5FTS5, H4.5FT6, H5.0-5.5FT (H80, 90, 100, 110,
120FT) (N005, P005) SHOWN.
1. COWL
2.
INSERT
3. WASHER
4. MOUNTING CAPSCREW
5. MAIN CONTROL VALVE
6. FRAME
Figure 1. Main Control Valve Mounting
Confidential/Proprietary - Do Not Copy or Duplicate
1
Electro-Hydraulic Main Control Valve
2000 SRM 1137
Electro-Hydraulic Main Control Valve
DESCRIPTION
The E-Valve is an electronically-controlled, closed-
center, load-sensing stack valve.
It uses an un-
loader valve (single functions only) and has parallel
hydraulic circuitry. Operating multiple functions
simultaneously will result in a nonproportionate
increase in pump flow to functions which receive
the lowest amount of pressurized fluid. A fixed
displacement pump is used in conjunction with the
inlet compensator to achieve the required load-sense
logic. Lift function is on main relief pressure setting.
Tilt and auxiliary functions are on secondary relief
pressure setting.
Lift pressure is unaffected by
secondary relief operation.
The electronic main control valve incorp