3.1 Before You Begin
1.
Welker
recommends that the unit have standard maintenance every six (6) months under normal
operating conditions.
In cases of severe service, dirty conditions, excessive usage, or other unique applications that
may lead to excess wear on the unit, a more frequent maintenance schedule may be appropriate.
2.
Prior to maintenance or disassembly of the unit, it is advisable to have a repair kit available for repairs of the system in
case of unexpected wear or faulty seals.
New seals supplied in spare parts kits should be lightly lubricated before being installed to ease the installation of the seals and
reduce the risk of damage when positioning them on parts. Wipe excess lubricant from the seals, as it may adversely affect
analytical instrument results.
For sample-exposed seals, Welker recommends non-hydrocarbon-based lubricants, such as Krytox®.
For non-sample-exposed seals, Welker recommends either non-hydrocarbon-based lubricants or silicone-based lubricants, such
as Molykote® 111.
After the seals are installed, the outer diameter of shafts and inner diameter of cylinders may be lubricated to allow smooth
transition of parts.
3.
All maintenance and cleaning of the unit should be performed on a smooth, clean surface.
4.
Welker recommends having the following tools available for maintenance. Please note that the exact tools required may
vary by model.
a.
½" Wrench
b.
6" Adjustable Wrench
c.
Adjustable Pliers
d.
Anti-galling Compound
e.
Hex Key Set
f.
Seal Pick
g.
Snap Ring Pliers
h.
Threadlocker
SECTION 3: MAINTENANCE
19
IOM-022
MODEL: GSS-4PM
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
