Hitachi 1800 - Manual (Page 16)

Repair
16 311826B
Repair
Required Tools
• Set of socket wrenches
• Set of adjustable wrenches
• 24 in. adjustable wrench
• Torque wrench
• Thread lubricant
• Anti-seize lubricant 222955
• Loctite
®
2760
™
or equivalent
Disconnect the Lower
1. Flush the pump, if possible. Stop the pump at the
bottom of its stroke. Relieve the pressure, page 12.
2. Disconnect the air or hydraulic hose. Plug all
hydraulic hoses immediately, to prevent contamina-
tion of the hydraulic system.
3. Hold the fluid outlet fitting (AD) with a wrench to
keep it from loosening while you disconnect the fluid
hose. See F
IG . 4.
4. Unscrew the coupling nut (103) from the connecting
rod adapter (105). Remove the coupling collars
(104); do not to lose or drop them. See F
IG . 4.
5. Hold the tie rod flats with a wrench to keep the rods
(106) from turning. Unscrew the nuts (107). Remove
the lower (102).
6. To service the lower, refer to manual 311825, sup-
plied. To service the air or hydraulic motor, refer to
the separate motor manual, supplied.
CAUTION
Use at least two people when lifting, moving, or dis-
connecting the pump. If disconnecting the lower, be
sure to securely brace the pump, or have two people
hold it while another disconnects it.
Before disconnecting the lower (102) from the
motor (101), be sure to note the relative position of
the pump's fluid outlet to the air or hydraulic inlet of
the motor. If the motor does not require servicing,
leave it attached to its mounting.