SyriXus Series Pumps Installation and Operation Guide
Section 9 Pump Maintenance, Troubleshooting, and Servicing
9-15
EAR99 Technology Subject to Restrictions Contained on the Cover Page
Reinstalling the
Wiper
1. Install the piston seal onto the retainer with the spring oriented
towards the retainer.
2. Install the wiper seal onto the piston base with the spring facing
down.
NOTE
In the Model 1000x pump, which has a wash gland option, the wiper
seal is installed with the spring facing
up
.
3. Thread the piston base onto the push tube.
4. Install the piston seal retainer onto the piston base.
5. Replace the cylinder over the piston and push tube assembly and
screw it into the cylinder mounting block. The cylinder should be
screwed into the cylinder mounting block until the cylinder bot-
toms firmly against the stop ring in the cylinder mounting block
(the cylinder will no longer turn).
Do not overtighten
.
6. Unscrew the cylinder until the inlet and outlet ports are lined up
as you had them before. Do not unscrew the cylinder more than
one full turn from the stop position.
7. Lock the cylinder by tightening the locking screw on the front of
the cylinder mounting block to 30 in-lbs (3.4 N-m). Reinstall cov-
ers.
9.11 Wear Ring
Cleaning and
Replacement
Although the wear ring does not routinely need to be replaced, occa-
sionally it becomes worn or damaged, depending on how the pump has
been used. Teledyne ISCO recommends that when replacing the seal
or cleaning the piston, check the wear ring for any signs of deterio-
ration.
1. Follow the instructions in Section 9.10 "Seal Cleaning and
Replacement", to access the cylinder.
2. Remove the piston seal retainer and slide off the seal. The wear
ring should then slide easily up and off the piston.
WARNING
Do not use metal tools on the seals, near ring piston or cylinder
bore (including micrometers or calipers).
The wear ring prevents the piston from direct metal-to-metal contact
with the cylinder wall, and should, therefore, extend at least 0.010"
beyond the circumference of the piston flange. Check the bottom of the
wear ring, which rests on the piston flange, for extrusion or any
unevenness. If there is an indentation (of 0.0010" or more) marking
the outline of the piston flange on the wear ring, then you should
replace the wear ring. However, if the surface is smooth, the wear ring
does not need replacing.
