Replacing charge pump journal bearings
Use a suitable press to remove and replace the journal bearings. Refer to the drawings below for
installation dimensions.
Replacing the journal bearings
P107 999E
Geroter
cover
Journal
bearing
1.72 mm ± 0.3
[0.07 inch ± 0.011
Assembly
1. Lubricate and install new seal (K150).
2. Install housing (K300). Install screws (K350). Using a 10 mm internal hex, torque screws per listing in
table.
3. Install alignment pins (K450). Install new gasket (K151).
4. Lubricate and reassemble the charge pump assembly, [shaft (K201), pin (S500), geroter (S100), two
clips (K205)].
Install the alignment pin (S500) in its original position. The alignment pin position is different for
clockwise or counterclockwise rotation.
5. Install the charge pump assembly into the housing.
6. Install the geroter cover (S200).
7. Lubricate and install the seal (S300).
8. Install the aux pad (K101).
9. Using a 10 mm internal hex, install screws (K400). Torque screws per listing in table.
10. Lubricate and install seal (K250). Install running cover (K301).
11. Install screws (K351) and brackets (K975). Torque screws per listing in the table.
Charge check / HPRV (45/53)
The high pressure relief and charge check valve assembly may be removed for cleaning and replacement
of the O-rings. These valves are factory set and are not field adjustable. Refer to the pump model code for
the factory setting when ordering replacements.
Removal
1. Using an 8 mm internal hex wrench, remove the valve seat plugs (K007).
2. Carefully lift the valve (H002) and spring (H003) assemblies from the center section using a magnet.
Inspection
Inspect the valves and mating seats in the valve seat plugs (K007) for damage or foreign material.
Reassembly
1. Lubricate and install new O-rings (K008, K010) and backup ring (K009) on valve seat plug (K007).
Service Manual
H1 45/53/60/68 Tandem Closed Circuit Axial Piston Pumps
Minor repair
58 |
©
Danfoss | June 2018
520L0928 | AX00000103en-US0303
