STG global TANVAC HDV3000, Operator'S Manual

Page: 150 / 329

5
C. Seals and V-Packing Maintenance
1.
Remove the manifold as described in
section 6.1-B. It is possible that the seal
and brass retainer ring assembly stays on
the piston or remains in the manifold when
removing.
2.
Using the packing extraction tool & slide
hammer, remove the brass retainer
ring/seal stack.
(Fig. A) Remove the low-
pressure seal using a needle nose pliers.
(Fig. B) Once this seal is removed, replace
with a new seal.
3. Remove the outer o’ring by taking a small
flat head screwdriver and working your way
under the o’ring and simply roll off.
(Fig. C)
4. The V-packing stack can be taken apart by
hand.
D. Seals and V-Packing Reassembly
1. Generously lubricate the parts when
reassembling. Examine brass components
for any damage or water residue build-up.
2. Insert low-pressure seal using Comet repair
tools.
(Fig. D) Place the brass retainer ring
on stand (Fig. D-1). Place tapered stainless
steel cylinder (Fig. D-2) on top of brass
retainer ring with the tapered narrow end on
the brass retainer. Insert a new low-
pressure seal, closed side facing up, on top
of tapered stainless steel cylinder so it lays
flat across the top.
(Fig. E) Gently push the
seal down through the tapered cylinder using
plastic insertion tool
(Fig. D-3.) Switch to
smaller diameter plastic insertion tool (Fig.
D-4) to push the seal into its seat inside the
brass retainer ring. (Fig. F)
3.
Replace the outer o’ring by simply starting on
one side and working it into the groove.
4. Stack the V-packing in correct order and
firmly press assembly into the manifold.
5. Install a new oil seal by laying the seal into
the opening and evenly pressing it into place.
6.
Reinstall the manifold onto the pump as
described in section 6.1-B.
Fig. A Fig. B Fig. C
Fig. D
Fig. F Fig. E
1.
2.
3.
4.
5.