Table 1. Directional Control Valve Connections
1st Spool
2nd Spool
3rd Spool
4th Spool
5th Spool
Pin Type
Connector
CPS152
CPS151
CPS149
–
–
Function
Aux 3
Aux 2
Aux 0
–
–
Hydraulic
Connection
LH Fork
Positioner
RH Fork
Positioner
Side Shift
–
–
DFSSFP
Connector
CPS152
CPS149
CPS151
CPS150
–
Function
Aux 3
Aux 0
Aux 2
–
Hydraulic
Connection
LH Fork
Positioner
RH Fork
Positioner
LH and RH Fork
Positioner
Auxiliary
–
DFSSFP with simultaneous fork position *
Connector
CPS153A
CPS149
CPS153B
CPS151
CPS152
Function
Aux 1A
Aux 0
Aux 1B
Aux 2
Aux 3
Hydraulic
Connection
LH Fork
Positioner
LH and RH Fork
Positioner
RH Fork
Positioner
5th Function
6th Function
NOTE:
* An additional Splitter Harness connects CPR150 with both 1st spool and 3rd spool.
Electrical supply is through the mast wire harness,
which is routed over the hose sheaves, parallel with
the header hoses. The mast wire harness connects
with the carriage wire harness, which is identical
for all versions of the directional control valve.
Harness connectors for unused functions are folded
back and taped in. An additional splitter harness is
installed for DFSSFP carriages with simultaneous
fork positioning.
Hydraulic operation of the spools in the directional
control valve is similar to those in the main control
valve.
Different in the inlet module is the absence of an LS
connection with the pump, the addition of a two
stage relief valve and the addition of a pilot
pressure supply valve.
The function of the two stage relief valve is to
maintain supply pressure just above the required
pressure as signaled by the internal LS line. Oil
supply pressure is regulated by relieving excess
pressure through port T, which leads to port T3 in
the main control valve. Maximum supply pressure
is regulated by the 19.5 MPa (2828 psi) MPa relief
valve, which reliefs through port T0, which leads to
port TAUX in the main control valve.
The function of the pilot pressure supply valve is to
admit and maintain oil pressure to a maximum of
1.5 MPa (218 psi) for the operation of the auxiliary
spools. See Figure 17 and Figure 18.
4000 SRM 1664
Description And Operation
13