Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
M
A
IN
T
E
N
A
N
C
E
Rotor Synchronization
10
1. Once the pump is disassembled, proceed to drain
the oil in the gearbox. Use the cap nut (
51
) on the
bottom of the gear case cover (
10
). If the oil is in
good condition, keep it in a closed reservoir in order
to avoid contamination. Replace as required – see
specifications.
35
6
2. Remove the coupling key (
35
) from the drive shaft (
9
).
51
3. Loosen the hexagonal bolts (
33
) and remove the gear case cover. Inside are the gears that drive
the pump. The drive gear (
41
) is driven with a key, while the driven gear (
42
) is locked by tapered
rings.
NOTE: When the socket head cap screws of the keyless shaft hub are loose the gear will
rotate independently of the shaft. When the keyless shaft hub is tight the gear will rotate
with the shaft.
47
10
33
9
4. Undo the socket head cap screws (
46
) and remove. All screws have a lock washer (
45
).
42
46
45
41
46
30
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
