25
HeavyCoat
MAINTENANCE
7.8
SERVICING THE FLUID SECTION
HEAVYCOAT 730
730
1
14
5
3
29
6
30
2
8
7
9
15
13
12
11
10
16
17
18
19
20
21
22
23
24
25
4a
4b
26
23
27
31
HEAVYCOAT 750 / HEAVYCOAT 770
1
14
5
3
6
30
2
8
9
15
13
12
11
10
28
16
17
18
19
20
21
22
23
24
25
4a
4b
31
Attention
Use of non-Wagner service parts may void
warranty. Ask for original parts made by Wagner
for best services. This pump should receive
a routine servicing after approximately 1,000
hours of use. Earlier servicing is required if there
is excessive leakage from the top packing or if
pump strokes become faster on one stroke or
the other. The use of Wagner EasyGlide (P/N
0508619) is recommended as an upper packing
lubricant. Do not substitute oil, water, or solvent
for an upper packing lubricant.
DISASSEMBLING THE FLUID SECTION
1.
Using a hex wrench, loosen the captive screws that secure
the PCB board assembly (Fig. 27, item 30) to the hydraulic
motor cylinder. Once removed, the board can hang by its
cord.
2.
Slide the retainer ring (1) up with a small screwdriver, then
push the connecting pin (2) out.
3.
HeavyCoat 730 -
Remove the siphon tube (26).
4.
Spin the fluid section removal nut (15) counterclockwise
so that it bottoms out on the threads on the cylinder (16).
5.
Place a wrench on the flats of the fluid section removal
nut (15). Turn the wrench counterclockwise to loosen the
entire fluid section.
6.
Carefully pull down the fluid section to remove from the
hydraulic motor.
7.
In order to service the fluid section, stabilize it by securing
the flats of the fluid section removal nut (15) in a vise.
8.
Unthread the foot valve housing (23) with a strap wrench.
9.
Remove upper packing spring (5), and upper packing set
(4a) from the motor/pump block.
10.
Place a wrench on the flats on top of the displacement rod
(6). Using a second wrench, loosen and remove the outlet
valve housing (13) from the displacement rod (6).
11.
Remove the seal washer (12), outlet valve seat (11), outlet
valve ball (10), outlet valve cage (28, HeavyCoat 750 /
