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1012 - 1022 Parts List
Item
Description
Quantity
Drawing
Number
Part
Number
Material
1
Relief Valve
1
A112UK
LXUK9219
Various
2
Cover
1
A1066UK
3M35-XUK9014
Cast Iron
3
O’Ring
1
BS046
Neoprene
4
Idler Gear
1
11002-A
3M5-1
Steel/Carbon
5
Body
1
1015-015
Cast Iron
6
Bearing
1
2RLS6/2RS
7
Mechanical seal
1
680-111-23AX12
8
Bearing
1
2RLS6/2RS
9
Circlip
1
NAM300-187
10
Rotor
1
A21445UK
Steel
11
Seal Housing
1
1015-012
Cast Iron
12
Shims
2
0.006” Melonex
13
Idler Pin
1
5225-A
3M31
Steel
Field Checklist
1.
No Oil is Delivered
• Suction lift too high for vapour pressures of liquid pumped
• While Tuthill Pumps will develop as high as 27 inches of vacuum, it is wise to reduce the vacuum to a minimum
• Bad leaks in suction line or port passages can be detected by submerging pressure line from discharge side of pump into a
pail of oil where the air will be seen in the form of bubbles
• Wrong direction of shaft rotation (In “R” models, check position of cover boss)
• Pump shaft not rotating (Check coupling or drive)
•
Relief valve setting too low (Discharging fluid through by-pass port)
2.
Capacity is too Low
• Suction lift too high
• Air leaks in suction line
• Suction line too small (Can be detected by installing a vacuum gauge directly at the pump suction
• Pump speed too slow
• Filter too small or obstructed
• Suction pipe or port not immersed in the liquid deep enough
• Piping improperly installed, permitting air pocket to form in pump
•
Increased clearance or wear in the pump will sometimes cause the pump to deliver an insufficient supply of liquid
• A folded gasket or a slight amount of dirt not only will frequently exaggerate the original trouble but will also be the cause
of leakage
Note:
The maximum vacuum at the pump suction should never exceed 15 inches of mercury. Not because of the inability of the pump
to handle a higher vacuum, but primarily because the vaporization that is liable to take place at a higher vacuum. Vaporization caused
by higher vacuums will generally result in capacity drop-off.
