Loader Bobcat 773. Manual — part 21
CONTROL VALVE (S/N 509640660 & Above, S/N
509616542 & Above) (Cont’d)
Removal And Installation (Cont’d)
Remove the right rear tire.
Locate the rectangular access cover (Item 1) [A] on the
right side of the loader frame.
Loosen one mounting bolt and remove the other
mounting bolt from the access cover [B].
Rotate the cover to expose the access slot in the loader
[B].
Disconnect the inlet hose from the control valve through
the access slot [C].
Remove the two control valve mounting bolts & nuts.
Remove the control valve from the loader.
Installation: Tighten the mounting bolt & nut to 18–20
ft.–lbs. (24–27 Nm) torque.
Reverse the removal procedure to install the control
valve.
A
P–04109
1
C
P–04110
–2–30–
773 BICS Loader
Service Manual
B
P–04108
A1
Lift Cylinder Base End/Restrictor
.134–141 (3,40–3,58 mm)
A2
Tilt Cylinder Base End
A3
Auxiliary Hydraulics
B1
Lift Cylinder Rod End
B2
Tilt Cylinder Rod End
B3
Auxiliary Hydraulics
C1
Load Check Valve/Lift Function
C2
Load Check Valve/Tilt Function
C3
Plug/Auxiliary Function
C4
Outlet Fluid Flow
D1
Lift Spool Detent
D2
Tilt Spool Centering Spring
D3
Auxiliary Spool/Centering Spring
E1
Port Relief Valve
E2
Anti–Cavitation Valve
Port Relief/Anti–Cavitation Valve
(If Equipped)
F1
Anti–Cavitation/Port Relief (optional) Valve
F2
Plug
Port Relief (If Equipped)
G1
Lift Spool End
G2
Tilt Spool End
G3
Auxiliary Spool/Centering Spring
H1
Auxiliary Electric Solenoid
H2
Plug or Auxiliary Port Relief (Optional)
H3
Auxiliary Electric Solenoid
MR
Main Relief Valve
CONTROL VALVE (S/N 509640660 & Above, S/N
509616542 & Above) (Cont’d)
Identification Chart
Item
773 Loader
Revised May 98
A
MC–02229
MR
G1
G2
G3
H1
D2
D3
D1
H2
F1
F2
C1
E1
E2
C2
C3
C4
A1
A2
A3
B1
B2
B3
H3
773 BICS Loader
–2–31–
Service Manual
CONTROL VALVE (S/N 509640660 & Above, S/N
509616542 & Above) (Cont’d)
Disassembly
Remove the BICS valve assembly from the control valve.
(See Page 2–20.)
Mark each anti–cavitation valve, port relief valve, plug,
spool and related parts for ease of assembly.
Bolt the control valve to a work bench for ease of
disassembly and assembly.
Remove the four large O–rings (Item 1) [A] and the small
O–ring (Item 2) [A] from the top of the control valve.
Remove the end caps (Item 1) [B] from the base end of
the lift and tilt sections.
Lift Base End Restrictor
Disassembly
Remove the restrictor (Item 1) [C] from the lift section
base end port.
Load Check Valve
Disassembly
Remove the load check plugs (Item 1) [D] from the lift and
tilt valve sections.
A
P–08950
2
1
1
C
P–08964
1
D
P–08965
1
–2–32–
773 BICS Loader
Service Manual
B
P–08963
1
1
CONTROL VALVE (S/N 509640660 & Above, S/N
509616542 & Above) (Cont’d)
Load Check Valve (Cont’d)
Disassembly (Cont’d)
Remove the spring (Item 1) [A] and poppet (Item 2) [A]
from the lift and tilt valve sections.
Remove the O–ring (Item 3) [A] from the plug.
Remove the plug (Item 1) [B].
Remove the O–ring (Item 1) [C] from the plug (Item 2) [C].
Main Relief Valve
Disassembly
Remove the main relief valve (Item 1) [D].
A
P–08966
3
1
2
C
P–11342
1
2
D
P–08969
1
773 BICS Loader
–2–33–
Service Manual
B
P–08967
1
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