Service Manual

Multi Pro 5800 Page 7 − 45 ExcelaRate Spray System
Boom Section Bypass Valve Service
Each Multi Pro 5800 ExcelaRate spray system includes
three (3) boom section bypass valves. Each bypass
valve is fully serviceable. Use the following procedure
for servicing the boom section bypass valves.
IMPORTANT: Make sure to remove and neutralize
chemicals from spray components before disas-
sembly. Wear protective clothing, chemical resist-
ant gloves and eye protection during repair.
Disassembly (Fig. 44)
1. Locate the valve being serviced and remove the
knob fork and the knob assembly.
2. Hold the valve stem and rotate the knob counter-
clockwise (unscrew) and remove the knob.
3. Remove and discard the two (2) O−rings from the
valve stem.
4. Remove valve body forks and separate bypass
valves. Remove and discard O−rings.
Assembly (Fig. 44)
NOTE: Replace, do not reuse gaskets and O−rings.
Coat O−rings and gaskets with vegetable oil or silicone
grease before installation to reduce damage during as-
sembly.
1. Install new O−rings.
2. Turn the knob onto the valve stem until the stem ex-
tends out of the top of the knob.
NOTE: The cut−out in the valve stem must open toward
the cross tube. If installed incorrectly, the bypass valve
will not regulate the product flow.
3. Install the knob assembly in the valve body and se-
cure with the knob fork as shown.
4. Assembly bypass valves to each other and to mani-
fold with forks.
1. Bypass valve body
2. Knob
3. Knob fork
4. Valve stem
5. O−ring (2)
6. O−ring
7. Valve body fork (2)
8. Valve stem cut−out
9. Cross tube
Figure 44
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