Hitachi ZX200-5G Workshop Manual page 222

14. Warm up pump casing (51) to 50 to 80 °C (122 to
176 °F).
d
CAUTION: Take care as pump casing (51) is too
hot.
15. Apply hydraulic oil onto bearings (10, 12) (2 used for
each) with shafts (13, 19) attached. Install shafts (13,
19) to pump casing (51) by using special tool (a).
If it is difficult to insert shafts (13, 19), tap them by
using a bar.
51
c
a- Special Tool
b- M8, Pitch 1.25 mm
16. Wait for pump casing (51) in order to cool down to
the temperature lower than 40 °C (104 °F).
17. Install O-ring (23) to plug (24). Install plug (24) to
pump casing (51).
j : 19 mm
m : 35 N·m (3.5 kgf·m, 26 lbf·ft)
d
CAUTION: The pump casing (51) assembly
weight: 65 kg (145 lb)
18. Attach nylon slings onto pump casing (51). Hoist
and place the pump casing (51) assembly with the
regulator mounting side up.
SECTION 3 UPPERSTRUCTURE
Group 8 Pump Device
a
b
19
c
W178-02-11-093
c- Wooden Block
19. Install the special tools (ST 2649, ST 2650) over the
spline parts of shafts (13, 19).
f
NOTE: If the special tools are not available, install a
vinyl tape onto the spline part of the shaft in order not to
damage oil seal (49).
20. Apply grease onto the inside of oil seals (49) (2
used). Evenly tap and install oil seals (49) (2 used) to
shafts (13, 19).
21. Remove the special tools (ST 2649, ST 2650) from
shafts (13, 19).
22. Install retaining rings (50) (2 used) to pump casing
(51).
W3-8-3-12
ST 2650
49
ST 2649
W178-02-11-094