Danfoss Series 40 M46 Service Manual

Inspection
Inspect the shaft and bearing for wear, scratching and pits. If wear, scratching or pitting is found,
replace the shaft and bearing. Rotate bearing while feeling for roughness. Replace bearing if it
doesn’t spin freely.
Reassembly
1. Using a snap ring pliers, install snap-ring (133 ). Lubricate and press bearing (131) onto shaft. Install
second snap-ring (133).
2. Install shaft and bearing assembly into front cover. Rotate shaft to align with block-splines. Ensure
bearing is installed deep enough to clear snapring groove.
3. Using a snap ring pliers, install snapring (132).
4. Cover shaft splines with an installation sleeve to protect lipseal during installation. Lubricate and
press new seal (301) into pump cover.
5. Install second snap-ring (132). Remove installation sleeve.
Shaft seal installation tool
P106 652E
7 in
2.75 in
0.370 in
0.750 in
3 in
2.45 in
1.5 in
1.24 in
SCR valves
The SCR valves are factory set and are not field adjustable.
Removal
1. Using a 1-1/4 in. hex wrench, remove relief valve plug (166). Remove and discard Oring (106).
2. Remove spring (165) and relief valve (1103) from pump housing.
Inspection
Inspect the sealing surfaces of the pump for nicks or scratches. Inspect the relief valve (1103) sealing
surface for nicks or scratches. If the relief valve (1103) is damaged, replace it.
Reassembly
1. Lubricate and insert relief valve (1103) and spring (165) into pump housing.
Service Manual
Series 40 M46 Variable Pumps
Minor repair
©
Danfoss | September 2017 11026743 | AX00000027en-US0202 | 33

Danfoss Series 40 M46 Specifications

General

Brand	Danfoss
Model	Series 40 M46
Category	Water Pump
Language	English