F-1031, Section 4202
Page 7 of 10
NOTE: To protect the rubber bellows of the mechanical seal,
place a piece of masking tape over the keyway on the impeller
shaft, making sure that the tape is able to be removed after bel
lows has passed over the keyway.
2.
Apply a light coating of seal lubricant to the O-ring on the stationary
ring assembly. Slip the ring over the end of the impeller shaft, with the
finish lapped face of the ring facing up (the opposite side of a new seal
ring has a mark on it). Slide it along the shaft and push it into and seat
it in the bore in the mechanical seal housing. If it can not be pushed in
by hand it may be tapped into place by use of a block of wood be
tween the ring and a hammer. (Protect sealing surface).
3.
Wipe the face of the previously installed stationary ring of the mechan
ical seal with a clean cloth and denatured alcohol.
4.
Apply a light coating of seal lubricant to the inside of the bellows as
sembly and wipe the face of the carbon ring with a soft cloth and de
natured alcohol. Liberally coat impeller shaft with seal lubricant. Slide
the bellows assembly onto the shaft until the carbon ring contacts the
stationary seal ring. Install spring on bellows assembly.
5.
Slide impeller on the shaft. The mechanical seal is held in place by
notches in the impeller. (Retaining ring used prior to 4/11/91).
IL1024
Figure 1. Mechanical Seal Lubrication Application
Stationary Ring
Lubricate O-Ring
Coat Shaft Area Bellows
Assembly Must Slide Over
Seat with Stationary Ring.
Bellows Assembly
Coat Inside of
Bellows Assembly
If Lubricant should get on faces of Stationary and
Primary Ring (Surfaces which seat
Against Stationary Ring), Wipe it Clean with a Soft Cloth
and Denatured Alcohol
Packing (No Longer Available After 2/4/05)
Waterous uses a braided graphite fiber, with reinforced flexible graphite
yarns and high purity graphite filament yarns that appear on the corners as
well as throughout the body of the packing. The graphite reinforcement
allows the flexible graphite yarns to provide greater tensile strength.
This type of packing reduces the frictional heat created between the shaft
and the I.D. of the packing. By dissipating the heat through the cross sec
tion of the packing, the heat is transferred to the packing gland and the
pump body.
WARNING
!
Packing Gland and Pump Body Temperature Hazard. May result in
serious burns.
Heat is dissipated through the cross-section of the packing, transfer
ring the heat to the packing gland and pump body.
Packing Removal
WARNING
!
Truck movement hazard.
May cause serious personal injury.
Stop engine, set the parking brake and chock the wheels before going
under truck to remove packing.
1.
Remove the unbalanced nuts, flat washers and packing gland halves.
2.
Engage the pump per appropriate operating instructions. Operate the
pump, gradually increasing the discharge pressure until the packing is
forced out of the stuffing box. Pressure in excess of 300 psi (20.7 bar)
may be required.
