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Maintenance
24 3A0237L
Maintenance
1. Before disconnecting or repairing hoses, relieve all
fluid pressure and shut off electrical power to pro-
portioner. See system operation manual.
2. Be sure fluid is cool before disconnecting hoses.
Instructions for Replacing
Individual A or B Hose
1. Before disconnecting hoses, relieve all fluid pres-
sure and shut off electrical power to proportioner.
See system operation manual.
2. Disconnect electrical wire from connectors (5). Dis-
connect fluid hose and remove from bundle.
3. For whip hose bundles, see Bundle Individual
Whip Hoses on page 26.
4. For hose bundles, see Bundle Individual Heated
Hoses on page 28.
Clean Orifice
Only for MD2 Valve using Orifice Block Kit 24E505 and
an orifice.
NOTE: 24E505 does not come with an orifice. See
on page 39 for orifice part numbers.
1. Follow Pressure Relief Procedure in MD2 valve
manual.
2. Use 5/16 in. nut driver to remove orifices.
3. Remove cap from orifice.
NOTE: The cap is held in place with reverse threads.
4. Remove needle from orifice. Thoroughly inspect all
o-rings and replace if necessary.
5. If necessary, use drill bit that is the same size as the
orifice to drill out the orifice. Orifice size is marked
on the orifice.
6. Liberally lubricate all o-rings.
7. Reassemble in reverse order. Torque orifices into
fluid housing to 20-30 in-lb (2.26-3.39 N•m).
NOTICE
To prevent cross-contamination of the orifices do
not interchange A component and B component
parts. The A component orifice is marked with an
A.