3
FLUID
Use only hydraulic fluid recommended for use with the pump. Supplementary oil additives are not recom-
mended. Regular checks should be made of the condition of the hydraulic fluid and the fluid level in the
reservoir, and establishing when the fluid is to be changed. When adding or replacing fluid, use enough fluid
to return the fluid level in the tank to its normal operating point. Be sure the fluid temperature is controlled so
that the minimum allowable viscosity at maximum operating conditions is not exceeded and that the maximum
viscosity at cold start does not cause the suction lift limits to be exceeded.
CAUTION
When replacing or adding fluid, be careful to keep foreign material from entering the fluid and system.
Check the fluid level in the tank before and after start-up to be sure it is within operating limits. If the fluid is
low, or drops as the system fills on start-up, add sufficient clean hydraulic fluid to the tank to bring the fluid to
its normal operating level.
VALVES
Before starting, check all valves to be sure they are in proper position and that there is no possibility of starting
the pump with a blocked suction or discharge line and that the pump is filled with oil.
Using a bleed point at the high point in the system, vent air from the system on start-up.
The relief valve should be about 5% above maximum system operating pressures. Do NOT set the relief valve
higher than the maximum pressure rating of the pump.
MAINTENANCE
GENERAL
If the installation and alignment instructions have been carefully followed, the pump should operate satisfacto-
rily with very little attention. Field maintenance is generally limited to the periodic maintenance checks and the
replacement of seals, gaskets and bearings. Major repair of elevator pumps in most cases is not economical.
IDP
Description
IDP Description
1 Case
16
Key
2 Rotor Housing
17 Bearing Retainer Plate
3 Pipe Plug
18 Retainer Bolt (4)
4 Tube
19 Idler
Rotor
(2)
5 Tube O Ring (2)
20 Idler Balance Piston Housing (2)
6 Housing O Ring
21 Thrust Plate
7 Cover
O
Ring
22 Spacer
(2)
8 Gasket 23
Hex Bolt (2)
9 Inboard Cover (all except 350 size)
24 Lockwasher (2)
10 Cover Bolt (8) up to 250 size
(16) above 250 size
25 Mechanical
Seal
26
Inlet Head
11 Power Rotor 27
Spacer Ring
13 Retaining Ring (2)
35 Seal Retaining Ring (250 size only)
14 Bearing
Spacer
47
Balance Piston Housing (350 size only)
15 Bearing
All quantities are one except when noted in parentheses
Table 1 – List of Material
PART NO.
ROTOR SIZE
187 218 250
275
312 350
10 (inboard end) 35 ± 5
50 ± 5
70 ± 5
54 ± 5
78 ± 5
100 ± 5
10 (suction end) 90 ± 5
140 ± 5
145 ± 5
54 ± 5
78 ± 5
100 ± 5
18
18 ± 2
20 ± 2
20 ± 2
16 ± 5
38 ± 2
38 ± 2
23
10 ± 2
15 ± 2
15 ± 2
26 ± 2
30 ± 2
55 ± 5
Table 2 – Bolt Torque Values (LB-FT)
