Viking Pump TSM845.1: LQ-QS 825, 823, 827 - Manual (Page 10)

SECTION TSM 845 1 ISSUE E PAGE 10 OF 13
fIGURE 16
fIGURE 17
fIGURE 18
GASKET TABLE
PUMP MODEL
NORMAL ➀
END
CLEARANCE
ONE SET Of
GASKETS CONSISTS
Of THE fOLLOWING
LQ & LS-825 008
(1) 015
(2) 007
(2) 005
Q & QS-825 010
(1) 015
(2) 007
(3) 005
End clearances are adequate for viscosities up to 750 SSU
(SAE 20-lube oil at room temperature) Higher viscosity
liquids require additional end clearances
As a general guideline, for viscosities between 750 and 7500
SSU (heavier lube oils) add an additional 50% of the end
clearance listed, for viscosities between 7500 and 25,000 SSU
(e g , resins) double the amount indicated
For specific recommendations for end clearances for viscosity
or for operating temperatures above 225ºF, check with your
Viking representative or consult the factory
➀
ADJUSTING HEAD GASKET END
CLEARANCE
Use either of the following procedures to properly adjust the
end clearance, when replacing gaskets
PROCEDURE A:
With the casing secured to the bracket and balance plate in
position, slide the rotor and shaft into the casing Insert the
feeler gage of the proper thickness into the port and between
two rotor teeth Install one 015” and 007” gasket onto the
head With the idler on idler pin, place head into the pump
casing With capscrews tight, the feeler gage should fit snugly;
otherwise gaskets should be added or removed until the
proper clearance is attained See figure 19
fIGURE 19
fIGURE 20
PROCEDURE B:
If the pump is in the pipeline and not accessible through ports,
remove the head and remove gaskets Put the head back
on and measure the gap as shown See figure 20 After
determining the gap between head and casing, select a
combination of gaskets with approximately 25% more total
thickness than the feeler gage plus required end clearance
See figure 18. Note: gaskets will compress when head is
tightened down Remove head, install all gaskets and the
O-ring, and then install head Tighten the head capscrews
and then check the pump by making sure the pump turns
over freely by hand