Nilfisk-ALTO NEPTUNE 5-46 PE, Service Manual

Page: 57 / 94

F
NEPTUNE PE-DE_en_Ver.1.0_October 2010
Service / Repair
57
Piston & Oil Seal
To inspect the plunger for cracks. Spray the inside of the plunger with fast evaporating cleaner
such as a brake cleansing agent. The brake cleansing agent will take a second longer to evapo-
rate from the crack, thus making the crack visible.
T
orque
106 Inch pounds
8,8 ft.lbs
13NM
Backup-ring
O-ring
Copper washer
Brass slinger plate
Oil seal
Carefully inspect and replace as needed, O-
rings and backup rings on the plunger rod
prior to reinstalling the plungers.
Also clean the brass slinger plates before reinstalling the plungers.
Do not re-use the copper washers!
Use one drop of medium strength thread locker on each plunger rod when reinstalling plunger
nut and torque to specifications.
Oil seals must be changed if there any signs of leaks or if they are removed.
The recommended way to remove the oil seals which are pressed into the pump body is to
sew the seal with an awl and pry down.
When installing new seals, a light coating of lubricant on the seals may ease the installation.
Make sure it is pressed in using equal pressure around the entire circumference.
NP5 Pump
Jetwash Direct ltd