Danfoss H1 078 - Filter Bypass Valve and Filter Bypass Switch

Inspection
Inspect the plug and sealing surfaces in the filter bracket. Replace any damaged components.
Reassembly
1. Install new seal (T045) and O-ring (T035) on plug.
2. Apply hydraulic fluid to the O-ring and seal for lubrication. Insert the plug into the bracket.
3. Use a 24 mm wrench to hold the plug in place and install the replacement filter. Hand tighten filter till
it contacts O-ring, then tighten 1/2 turn further.
4. Start the prime mover. Cycle the pump through normal machine operation and check for leaks.
External Filter Replacement
T015
24mm
P106 035E
T150
T035
T045
Filter Bypass Valve and Filter Bypass Switch
Removal
1. Remove three screws (T250) using a 6mm internal hex wrench.
2. Remove the filter adapter (T010) and gasket (T350). Discard the gasket.
3. Use an 8 mm internal hex wrench to remove plugs (T025).
4. Remove and discard O-rings (T040).
5. Remove spring (T030), and poppet (T020).
6. If necessary, use a 3 mm internal hex wrench to remove cap screws (T300) and bypass switch (T200).
It is not necessary to remove switch (T200) unless it is being replaced.
Service Manual
H1 Pumps 069/078, 089/100, 115/130, 147/165, 210/250
Minor Repair
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Danfoss | May 2018 520L0848 | AX00000087en-US0308