Flowserve 400-D Assembly, Operation And Maintenance Manual page 9

5. Using Floating Piston Guide 47520, place the Floating
Piston into the non-knurled end of the new Sealant
Barrel. The Floating Piston should be flush with the
bottom of the Sealant Barrel.
CAUTION: Make sure the Sealant Barrel
and Floating Piston Assembly are free of
contaminates prior to assembly.
6. Replace the Sealant Barrel O-Ring (25).
7. Place the Sealant Barrel onto the Body, with
the knurled end furthest away from the Body,
and tighten hand-tight.
8. Place the Sealant Barrel end of the gun into the
vise and tighten the Body using Gun Assembly
Wrench.
9. After equipping the gun with a new Sealant Barrel,
recharge the gun with hydraulic fluid as described
in this brochure.
Pump Cylinder Replacement
1. Remove the Handle (1), open the By-Pass Valve (12)
and push the Floating Piston (41) to the bottom of the
Sealant Barrel (24). Clean the Handle and replace.
2. With the gun in the horizontal position, Handle up,
remove the Shoulder Screw (20) from the Pump Piston.
3. Tip the linkage back.
4. Unscrew the Hydraulic Pump Cylinder (7) with
Spanner Wrench 47518. (The cylinder cavity will
probably fill with hydraulic fluid. Do not disturb
this condition.)
5. Replace the O-Ring (10) in the bottom of the cylinder
cavity of the Body.
6. Install O-Ring (9) on the new Hydraulic Pump
Cylinder. It is recommended that the cylinder be
replaced as assembly 60040.
7. Install the new Hydraulic Pump Cylinder into the
Body (6) and tighten with Spanner Wrench 47518.
8. Reconnect the Linkage.
9. After equipping the gun with a new Hydraulic Pump
Cylinder, recharge the gun with hydraulic fluid as
described in this brochure.
Pump Cylinder
Piston O-Ring Replacement
Remove the defective Pump Cylinder Piston O-Ring (30) using
a sharp object. Pinch the O-Ring between the forefinger and
thumb. Push the O-Ring into the top of the Hydraulic Pump
Cylinder (7) so that it partially enters the O-Ring groove. Use a
blunt instrument to work the O-Ring completely into the groove.
400-D HYDRAULIC HAND GUN
Care and Maintenance
Check Valve Repair
Symptoms of Check Valve failure are easily recognizable.
When the Handle develops a spring-like action where,
under pressure, the Handle will spring back each time it
is pushed down, the Check Valve is not seating
properly. This is usually indicative of a foreign particle
on the valve seat.
1. Open the By-Pass Valve (12) and push the Floating
Piston (41) to the bottom of the Sealant Barrel (24).
2. Close the By-Pass Valve.
3. Place the gun in a vise on a workbench and loosen the
Check Valve Screw (4).
4. Remove the Check Valve Screw and Washer (8) and
turn the gun Check Valve down so the Spring (18),
Ball (29) and Screen (11) fall out.
5. If it did not fall out, use a pointed instrument to remove
the cylindrical Screen (11) from the Check Valve cavity.
6. Thoroughly clean the Check Valve seat and cavity with
a lint-free paper towel. The cleaning must be thorough
or the Check Valve may not seat.
7. Position the gun on the workbench with the Check
Valve cavity up.
8. Insert the Ball.
9. With the Ball in position on the seat, place a short
length of ¼" brass or cold-rolled rod on the Ball and,
with a firm blow from a hammer, seat the Ball.
10. Turn the Body (6) over and remove the Ball by tapping
the unit against your hand.
11. Clean the cavity and seat the Ball again.
12. Turn the Body upside down. If the Ball falls out,
repeat the seating procedure until the Ball does not
fall out without assistance.
13. Insert the Screen and Spring.
14. Replace the Washer and Check Valve Screw and
tighten the screw snugly, being careful to not
overtighten.
15. After equipping the gun with a new Check Valve
Assembly, recharge the gun with hydraulic fluid
as described in this brochure.
By-Pass Valve
Replacement
1. Remove the Handle (1), open the By-Pass Valve (12)
and push the Floating Piston (41) to the bottom of the
Sealant Barrel (24). Clean the Handle and replace.
2. Remove the By-Pass Stop Screw (15) and the By-Pass
Valve Stop (14).
3. Remove the damaged By-Pass Valve.
4. Lubricate the By-Pass Valve O-Ring (13) on the new
By-Pass Valve.
Flow Control
Nordstrom Valves
(cont.)
9