Alfa Laval Contherm 6X11, Инструкция по эксплуатации

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9 Troubleshooting
9.4 Rotor Lift System
A hydraulic Rotor Lift System is provided as standard equipment with each vertically mounted Contherm
™
. This system
provides a safe and easy method for lowering or raising the Contherms
™
rotor and blade assembly for inspection, maintenance,
or manual cleaning.
If a problem with the system should occur, the following procedures show how to identify and resolve it.
Problem: The most common problems that may occur in the Rotor Lift System include the following:
1. Rotor moves opposite to the stack valve handle.
2. Rotor Lift not operating smoothly in either direction.
3. Rotor Lift will lower but will not return.
4. Oil is seeping from the bottom of the lift cylinder around the piston rod.
5. Oil is leaking around the cap at top of the cylinder.
Table 9-5 describes each of the four possible Rotor Lift System problem areas. When applicable, the table will direct you to the
appropriate maintenance related procedure in Chapter Seven.
Table 9-5. Rotor Lift System
Problem Possible Cause How To Resolve
Air in system. Bleed air by raising and lowering lift several times.
Confirm that the supply tank has a vented cap to
allow air to escape. Check oil supply level.
Rotor Lift System Not Operating
Smoothly in Either Direction
Oil contamination due to water
(oil has creamy and foamy
appearance). Drain contaminated oil from system and replace
with clean oil. Refer to Table 6-8 for oil type
recommendations.
Stack valve blocked. Disconnect lines to the stack valve and inspect for
any restrictions.
Hydraulic lift pump motor is not
operating. Check wiring and/or fuses.
Rotor Lift System Will Lower but
Will Not Return
U-cups are damaged or twisted. Disassemble hydraulic lift cylinder and inspect piston
and U-cups. Refer to Section 7.9.4, Disassembly
of Hydraulic Lift Cylinder.
Oil Seeping from Bottom of Lift
Cylinder Around Piston Rod Damaged O-Rings. Replace the following O-Rings:
1. O-Ring, P/N 7401137-02
2. O-Ring, P/N 7401137-04
Oil Leaking Around Cap at Top of
Cylinder Damaged O-Ring. Replace O-Ring, P/N 7401137-02.
9.5 Product Heating
If a product heating problem does occur, the following procedures will show you how to identify its cause and resolve the problem.
The two most common product heating problems that may occur in your Contherm
™
are:
1. Product is not being heated to the specified temperature.
2. Product is burning onto the cylinder wall.
Problem: Product Not Heated to Specified Temperature
Table 9-6 identifies specific factors that may result in the product not being heated to the proper temperature. To resolve the
problem, perform the appropriate action as described in the table. When applicable, the table will direct you to the appropriate
maintenance related procedure in Chapter Seven.
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