Viking Pump TSM320.2: GG-HL 75/475 - Manual (Page 6)

SECTION TSM 320.2 ISSUE F PAGE 6 OF 9
To Reassemble Model H75, HJ75, or HL75
Lip Seal Pumps: See Figure 8)
FIGURE 7
EXPLODED VIEW SERIES 75 & 475 PUMPS (H, HJ AND HL SIZE)
ITEM NAME OF PART ITEM NAME OF PART ITEM NAME OF PART
1 Key for Motor Shaft (Full Length) 7 Relief Valve 13 Idler Bushing
2 Capscrews (Pump on Motor) 8 Capscrews for Relief Valve or Cover Plate 14 Gasket for Head
3 Casing 9 Mechanical Seal (Complete) 15 Idler Pin
4 Pipe Plugs - 1/8” 10 Lip Seal (2) 16 Head
5 Machine Screw (2-Mech. Seal, 1-Lip Seal) 11 Rotor 17 Capscrews for Head
6 Gasket for Relief Valve or Cover Plate 12 Idler
1. INSTALL THE LIP SEALS. The lip seals should be
installed in the casing one at a time from the head end.
The sealing lips must face away from each other.
NOTE: Use an arbor press of 2.188 diameter and press
the lip seals in the casing as far as they will go.
2. LUBRICATE THE LIP SEALS. Fill the area between the
lips and the lip seals with grease.
3. INSTALL THE ROTOR. Flush the rotor hub with light oil
(not grease) and insert the rotor in the casing with the
hub through the lip seals.
CAUTION !
Turn the rotor back and fourth as you
exert enough force to push it through the
lip seal and to the bottom of the casing.
Be careful not to fold under the lip of the
inner seal.
correct position of the idler and crescent. ( See Figure 8
and Disassembly Step 2). Tighten the head capscrews
and then check the end clearance.
7. CHECK PUMP END CLEARANCE. Measure the
clearance between the back of the rotor and the
machined surface in the bottom of the casing by inserting
a feeler gauge through the port opening. This is the end
clearance. Normal amount is 0.003” to 0.005”. Add or
remove gaskets until the figure is reached.
FIGURE 8
SECTIONAL DRAWING OF MODELS H75, HJ75 & HL75
LIP SEAL PUMPS
MOUNTING FLANGE
IDLER
HEAD
CRESCENT
ROTOR
LIP SEALS (2)
4. INSTALL THE IDLER. Put the idler with the bushing on
the idler pin.
5. PLACE THE HEAD GASKETS ON THE PUMP HEAD.
The proper amount of gaskets should be used to provide
the necessary end clearance within the pump so it turns
freely with no appreciable end play. Gasket Table 2
gives the normal amount of gaskets used.
6. THE HEAD CAN NOW BE ASSEMBLED ON THE
PUMP. Tilt the top of the head away from the pump
slightly until the crescent enters the inside diameter of
the rotor and rotate the idler until its teeth mesh with the
rotor teeth. Do not damage the head gaskets. Note the