New Holland CX720 Repair Manual page 2524

Pump - Repair (C.20.F.20 - F.10.A.32)
1. Major repairs are those repairs which require the
removal of the end cap or side cover. Repairs of this
type are to be performed only by Sauer- Sundstrand
Authorized Service Centers and/or original equip-
ment manufacturers who have personnel adequately
trained to perform these repairs. Performing major
repairs on the Series 90 Hydrostatic Transmission
may affect the unit warranty status, thus the branch
service manager should be consulted prior to such
an undertaking.
Cleanliness is a primary means of assuring satisfac-
tory hydraulic motor life, on either new or repaired
units. Cleaning parts by using a clean solvent wash
and air drying is usually adequate. As with any preci-
sion equipment, all parts must be kept free of foreign
materials and chemicals. Protect all exposed sealing
surfaces and open cavities from damage and foreign
material.
During the assembly of the Series 90 variable motor,
all surfaces, which have relative motion between two
parts, should be coated with a film of clean hydraulic
oil. This will assure that these surfaces will be lubri-
cated during start-up.
Replace all O rings and gaskets. Lightly lubricate all
O rings with clean petroleum jelly prior to assembly.
All gasket sealing surfaces must be cleaned prior to
installing new gaskets.
POWER TRAIN - TRANSMISSION Hydrostatic
2 4/7/2006
C.20.F / 72