Hydraulic Circuit - Paccar BRADEN HP125B Installation Maintenance And Service Manual

TYPICAL HYDRAULIC CIRCUITS
NOTE: The hydraulic circuits shown below are representative of typical HP125B winches with single and two-speed
hydraulic motors and brake valves. Options and accessory equipment may result in changes to the circuits defi ned.
If there are any questions regarding the hydraulic circuit, refer to the information supplied by the original equipment
manufacturer, or contact the PACCAR Winch Division Product Support Department, as previously defi ned. (ALWAYS
have the winch model and serial number available when contacting PACCAR Winch Division.)
Electric Shift Circuit
86 87 87A
30 85
Normally Open SPST Switch*
(Engaging Switch Shifts Motor
to High Speed)
+12 VDC Power
* DO NOT use a
momentary contact
switch. This type of
switch will return to the
open position when
released, shifting the
motor back to low speed.
Two Speed
B A
12V DC
BRAKE SOLENOID
VALVE
BR
CHECK
VALVE
P1
HOIST
2-Speed Hyd. Motor Sub-Assy Control Circuit
("A" Port Toward Flange)
Hella 87499 Relay
(or equivalent -
12 Volt DC,
40 Amp, SPDT)
Motor
Solenoid
1. Ground
1
2
2. Empty
3
3. Apply 12V DC power to shift
2-SP HYD MOTOR
2 - SPEED
SELECTOR
VALVE
P
T
T A
G
P2
ITEM 7 LOWER
WINCH
BRAKE
BRAKE
VALVE
BR
X
DR
CONTROL
VALVE
WINCH CONTROL CIRCUIT
EXTERNAL CASE DRAIN REQ'D
motor to High Speed
10
ITEM 13
CASE DRAIN
(CUSTOMER)
Single Speed
WINCH ASSEMBLY
W/BRAKE VALVE
& STATIC BRAKE
WINCH
BRAKE
PUMP
NOTE:
Terminals 1 and 3
may be reversed.