Danfoss Series 40 M46 Tandem, Руководство по обслуживанию, Страница: 28 / 48

Standard procedures, removing the pump
Before working on the pump, clean all dirt and grime from the outside.
If the pump has an auxiliary pump attached, remove both pumps as a single unit.Tag all hydraulic lines as
they are disconnected and plug all open ports to ensure that dirt and contamination do not get into the
pump.
C
Caution
Contamination can damage internal components and void the manufacturer’s warranty. Take
precautions to ensure system cleanliness when removing and reinstalling system lines.
Removal
1. With the prime mover off, thoroughly clean all dirt and grime from the outside of the pump.
2. Tag and disconnect each hydraulic line connected to the pump. As hydraulic lines are disconnected,
plug each open port, to ensure that dirt and contamination do not get into the pump.
3. Remove the pump and its auxiliary pump (if applicable) as a single unit.
C
Caution
Be careful not to damage solenoids and electrical connections when using straps or chains to remove
pump from machine.
Inspection
1. Ensure the work surface and surrounding area are clean and free of contaminants such as dirt and
grime.
2. Inspect the hydraulic fluid for signs of system contamination, oil discoloration, foam in the oil, sludge,
or small metal particles.
Reassembly
1. Before replacing the pump on the machine, replace all filters and drain the hydraulic system. Fill the
system with the correct, filtered, hydraulic fluid.
2. Flush the lines before replacing the hydraulic fluid.
For repair part information, see Danfoss publication Series 40 M46 Variable Pump Parts Manual
BLN-2-41701 for your model.
Displacement limiter
Removal
Only remove displacement limiter (911) if replacement is necessary. Mark the location of displacement
adjustment and neutral adjustment screws before disassembly. This saves time during re-assembly.
1. Remove snap ring (928) and sleeve (929). Use a 1/4 in. hex wrench to hold neutral adjustment screw
in place. Use a 9/16 in. hex wrench to remove hex nut (115).
2. Use a flat screw driver to hold displacement limiter (911) in place. Use a 9/16 in. hex wrench to
remove lock nut (927).
3. Using a 3/8 in. hex wrench, remove five bolts (921) from servo cover (902).
4. Unscrew servo cover (902) to remove it from neutral adjustment screw. Remove and discard gasket
(936).
5. Turn displacement limiter (911) out of servo cover (902).
Service Manual
Series 40 M46 Variable Pumps
Minor repair
28 | © Danfoss | September 2017 11026743 | AX00000027en-US0202