Integral Charge Pressure Filter Replacement - Danfoss 90 Series Service Manual

Service Manual
Minor repair

Integral charge pressure filter replacement

Series 90 Pumps
12. Install the charge pump cover retainer (H70) and the six internal hex screws (H80). Torque the screws
per the table at the right..
Retainer screw torque
Frame size
030 – 100
130 – 250
13. For pumps with auxiliary mounting pads, install the O-ring and auxiliary mounting pad adaptor onto
the end cap. Refer to the corresponding section for instructions on auxiliary pad installation.
Removal
1. Remove the filter canister (N40) from the filter head (N10) as described on the canister.
2. Hold the filter head in place and loosen the lock nut (N20) using the wrench size corresponding to
pump frame size.
3. Rotate the filter head counterclockwise to remove it from the housing. Remove and discard the O-
ring (N15).
4. Remove the hydraulic tube (N25) from its bore in the endcap.
Lock nut wrench size and torque
Frame size
030 – 042
055 – 130
180 – 250
Inspection
Inspect the filter head and lock nut sealing surfaces. If you find any nicks or scratches, replace the
damaged components.
Reassembly
1. Install the hydraulic tube (N25) into it's bore in the endcap. Install the filter head (N10) into the port
using a new O-ring (N15). The hydraulic tube should go in with low force.
2. After rotating the filter head clockwise so that the threads engage with the threads in the endcap,
continue to rotate it clockwise between 6 and 7 revolutions. Position head as desired.
C
Caution
Failure to install the filter manifold or filter head to a sufficient depth in the end cap will result in
insufficient engagement of the tube in the end cap bore. This may allow unfiltered oil to bypass the
filter and enter the charge system.
3. While holding the filter head in the desired position, tighten the swivel lock nut (N20) and torque as
shown in table.
4. Install a new filter canister (N40) per the instructions on the filter canister.
520L0818 • Rev 0101 • August 2015
Torque
16 N•m [11.85 lbf•ft]
32.5 N•m [24 lbf•ft]
Wrench size
1-3/8 inch
1-5/8 inch
1-5/8 inch
Torque
70 N•m [52 lbf•ft]
122 N•m [90 lbf•ft]
156 N•m [115 lbf•ft]
55