Tennant ATLV 4300 Service Manual page 106

HYDRAULICS
10. Mark, disconnect, and plug the four
hydraulic hoses leading to the propel pump.
11. Remove the two hex screws holding the
propel pump to the bellhousing.
NOTE: The bottom hex screw can be accessed
easier with the motor mount removed.
12. Pull the propel pump out of the bellhousing
and remove it from the machine.
13. Remove the directional hub from the side of
the propel pump and install on the new
pump in the same orientation. Use blue
loctite (242) on the threads of the cap screw.
Tighten to 18 -- 24 Nm (15 -- 20 ft. lb).
14. Remove the hydraulic fittings from the old
propel pump and install into the new pump in
the same orientation.
15. Position the new pump assembly into the
engine bellhousing. Line up splines on the
pump input shaft with the teeth in the
flywheel coupling. Push the pump in until it is
against the bellhousing plate.
16. Reinstall the two hex screws into the pump
mount holes. Tighten to 31 -- 40 Nm
(27 -- 35 ft. lb).
NOTE: The pump directional hub faces the rear of
the machine.
17. Reconnect the four hydraulic hoses to the
propel pump. See hose diagram in this
section.
NOTE: Observe hydraulic cleanliness
requirements when opening hydraulic lines.
18. Reinstall the accessory pump into the propel
pump. Make sure the O--ring is installed on
the face of the pump. Reinstall the hardware
and tighten to 31 -- 40 Nm (27 -- 35 ft. lb).
19. Reconnect the one small hydraulic hose to
the accessory pump. See hose diagram in
this section.
NOTE: Observe hydraulic cleanliness
requirements when opening hydraulic lines.
5-8 ATLV 4300 330495 (10- -98)