22
OPERATION AND MAINTENANCE MANUAL
QTS SERIES
Twin Screw Positive Displacement Pump
QTS-M
08
QTS-M
08
MAI
N
T
E
N
AN
C
E
Bill of Materials
Please use this table and diagram to identify every component to be assembled.
Bill of Materials:
1
Front cover
19
Synchronization ring
37
Front bearing
2
Left rotor
20
Tapered driven ring
38
Rear bearing
3
Right rotor
21
Cover nut
39
Lock washer
4
Pump casing
22
Flat washer
40
Socket head cap screw
5
Back cover
23
Spring washer
41
Drive gear
6
Bearing housing
24
Set screw
42
Driven gear
7
Pump base plate
25
Dowel pin
43
Bearing lock washer
8
Driven shaft
26
O-ring
44
Bearing lock nut
9
Drive shaft
27
Gasket
45
Lock washer
10
Gear case
28
Socket head cap screw
46
Socket head cap screw
11
Rotor nut
29
Front oil seal
47
O-ring
12
Mechanical seal
30
Flat washer
48
Pressure release valve
13
Button/socket head set screw
31
Hexagon bolt
49
Rear oil seal
14
Stud
32
Eye bolt
50
Oil sight glass
15
Bearing spacer
33
Hexagonal bolt
51
Hex Plug
16
Gear spacer
34
Gear key
52
Dowel pin
17
Retaining flange
35
Coupling key
53
Flush nipple
18
Tapered drive ring
36
Lock ring
54
Platic Plug
Note: Depending on the model, some components may not be included.
Torque Values
Use the following torque table to tighten each item when indicated on the manual:
# Part
Piece
QTS
025
QTS
100
QTS
200
QTS
300
QTS
350
QTS
400
Units
21
Front cover nuts
2 (24
lb in)
15
20
30
50
50
lb ft
11
Rotor nut
5 (60
lb in)
25
40
50
60
70
lb ft
40
Socket head cap screw
(bearings)
2.5 ( 30
lb in)
10
15
20
25
30
lb ft
44
Bearing lock nut
5 (60
lb in)
20
30
40
50
60
lb ft
46
Socket head cap screw
(sync ring)
1
1.7
4.2
6.25
6.9
7.5
lb ft
12
20
50
75
83
90
lb in
Coupling set screws
10 l
b·ft for all models.
H
exagonal bolts/hexagonal nuts motor/base, pump/base,
40
lb·ft.
Minimum Thickness Gage Between Rotor Flanks
Model
Value
QTS
025
0.003
in
QTS
100
0.006
in
QTS
200
0.007
in
QTS
300
0.010
in
QTS
350
0.010 in
QTS
400
0.015
in
NOTE: Value at both flanks of the rotors
