Repair
7-11
E1999 Nordson Corporation
All rights reserved
104 330H
Issued 8/99
Manual 1-8
Use the following procedures to repair 2:1 and 4:1 hydraulic sections with
three tie rods.
1.See Figure 7-4. Remove the hydraulic section from the air motor by
unscrewing the bolts that secure the solvent chamber (1) to the air
motor lower head. Pull the hydraulic section away from the air motor
until the bottom of the connecting rod and the top of the plunger (5)
are exposed.
2.Place wrenches on the flats of the connecting rod and plunger. Hold
the connecting rod and turn the plunger counter-clockwise until the
plunger and connecting rod are separated.
3.Remove the three hex nuts (15) and lockwashers (16) from the tie
rods(14) and pull the siphon ball check (11) off the pressure housing.
Itmay be necessary to use a brass-headed hammer to remove the
siphon check.
4.The ball cage (9) and cage pin (10), and ball (12), can now be
removed from the siphon housing.
NOTE: Over time, the ball and siphon housing seat (13) wear into each
other, so should be kept together as a matched set. The seat is not sold
separately. A siphon check kit is available which includes a new siphon
housing, ball, ball cage, and O-rings. Refer to the
Parts
section for the kit
part number.
5.Unscrew the tie rods (14) from the solvent chamber (1).
6.Place the solvent chamber on two wood blocks. Make sure the lower
edge of the chamber rests on the blocks and the pressure
housing(14) is between the blocks, with approximately 10 cm (4 in.)
of clearance below the pressure housing. Drive the plunger (5) out of
the pressure housing with a hardwood dowel.
7.Use a punch inserted through the two holes in the bottom of the
solvent chamber (1) to drive the pressure housing (4) and packing
gland (2) out of the solvent chamber. Remove the O-rings (3) from
the pressure housing.
8.Place the flats on the top of the plunger (5) between the jaws of a
vise. Unscrew the pressure ball seat (17) from the bottom of the
plunger (5). Remove the ball (19) from the plunger (5) and the
O-ring(18) from the pressure ball seat (17).
5. 2:1 and 4:1 Hydraulic
Section with 3 Tie Rods
Disassembly
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