ALBIN PUMP ALH - Replacement of the Seal Ring (REF 27) and the Shaft Seal (REF 26)

18 albinpump@irco.com  Albinpump.com  Albin Pump ALH Instruction Manual
since 1928
ALH
Maintenance
6.4.2 - REPLACEMENT OF THE SEAL RING (REF 27) AND THE SHAFT SEAL (REF 26)
ALBIN hose pumps are equipped with a leakage channel (refer below image) that allows to see the wear of the seal
ring or thr shaft seal. This channel is at the back of the pump casing underneath the gearbox ange. It also protects the
gearbox seals by leaving the lubricant or the product to pass freely at the back of the pump casing.
REF 27
REF 41
REF 26
4172
Leakage
channel
leakage channel
PUMPS FROM ALH05 TO ALHX65
(Refer to the nomenclature §9.3 for the landmarks of parts).
1 - Isolate the pump from the power supply.
2 - Empty the lubricant and clean out the pump, see §6.1.
3 - Remove the pump hose, see §6.3.1.
4 - Disassemble the pump cover and withdraw the cover seal (REF 10).
5 - Disassemble the wheel by unscrewing the expansible hub (REF 19). Refer to §9.10 for expansible hub assembly and
disassembly.
6 - Withdraw the wheel of the pump shaft with a suitable lifting equipment.
7 - Support the gear motor with a suitable lifting equipment.
8 - Unscrew the nuts (Gearbox Studs) to free the gearbox from the casing (REF 41) and withdraw the gearbox from the
pump casing.
9 - Extract the damaged seal ring (REF 27).
10 - Slip on the spacer ring (REF 73) only for ALH50 and ALH65 HELICAL GEARBOX models Refer to §9.3 exploded view
image for location, if necessary and glue to the shaft. Position the new seal ring (REF 27) against the spacer ring
or the gearbox shaft’s shoulder. Fill the gap between the key-way and the seal ring with silicone mastic to ensure
correct.
For Pumps ALH100 and ALH125 the wheel is automatically positioned by the spacer ring and seal
ring. Therefore no adjustment is necessary.