9
307001
Service
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 6.
Disassembly
(Fig. 2)
1.
Relieve the pressure
.
2.
Solvent flush the pump, if possible, and
relieve
the pressure
again.
3.
Screw the shouldered nut (15) off the yoke (18).
4.
Remove the four locknuts (8) from the tie rods (19)
and remove the tie plate (16) with the pumps (22)
and yoke still attached.
5.
Remove the nuts and lockwashers (4 and 6) from
the pump displacement rods and remove the yoke.
6.
Remove the three screws and lockwashers (4 and
6) holding each pump to the tie plate and remove
the pumps.
7.
To service the air motor, refer to separate instruc-
tion manual 306982.
8.
To service the displacement pumps, refer to sepa-
rate instruction manual 307430.
Reassembly
(Fig. 2)
1.
Place the displacement pumps in the tie plate (16)
and secure with the screws (4) and lockwashers
(6).
2.
If the rod extensions (20) were removed, replace
them on the displacement rods and secure with
the cotter pins (9). Secure the rod extensions to
the yoke (18) with the lockwashers (5) and nuts
(7).
3.
Position the tie rods (19) in the tie plate (16) and
install the nuts (8), torquing evenly to 30–50 ft-lb
(47–68 N
S
m).
4.
Screw the shouldered nut (15) down onto the
yoke.
5.
Reconnect the ground wire if it was disconnected
during service.
Mixing Antifreeze and Water
To ensure complete mixing, the outlet line should be at
least 1 in. diameter tubing or 3/4 in. pipe. Runs shorter
than 45 m (150 ft) should use a 100 mm (4 in.) diame-
ter x 0.9 m (36 in.) mixing chamber fabricated of
schedule 40 pipe.
The plumbing and suction lift to the pump inlets must
meet certain specifications so the volumes of the two
fluids supplied to the pump remain equal, to ensure
proper 1:1 proportioning. The inlet lines must be the
same diameter and length, with the same number of
bends or elbows. The lift requirements of the two inlets
can vary within a range of 0.45 m (18 in.). Use a float
valve set at the 0.45 m (18 in.) level of one of the fluid
supply tanks to ensure that the lift requirement is
maintained.
Fig. 2
7223A
1
15
4
6
8
1
19
18
7
5
16
22
Torque to
35–50 ft-lb
(47–68 N
S
m)
Содержание Hydra-Cat A Series
Страница 4: ...4 307001 Notes ...
