Graco Hydra-Cat 207-388 F, Instructions And Parts List

TROUBLESHOOTING GUIDE

WARNING

Check all possible causes and solutions before

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disassembling the mixer for repair. If problem is still not

To reduce the risk of serious bodily injury, 

corrected, refer to the troubleshooting sections in the

 injection, follow this procedure before

separate manuals supplied with each component in

checking. or repairing any parts and whenever you

your system.

shut down the 

1.. Close the mixer material valves.

2. Open the solvent flush valve and flush until

clean.

3 .

Shut off the air to the mixer motor.

4. Shut off the material pumps and solvent

5 .

Open the dispensing valve to relieve pressure.

6. Open any drain valves.

PROBLEM

Air motor won’t run

Little or no Part A (Resin) coming

out

Little or no Part B (Catalyst) com-

Material supply container

ing out.

Plugged material inlet (31) or
check 

 valve.

Air motor runs but material not
mixed properly.

CAUSE

SOLUTION

Not enough air pressure or

volume.

Closed or clogged air valves (42)
or lines.

Check. Requires 25 to 30 CFM

at 

 psi   bar) for con-

tinuous operation.

Open, clear.

Hardened material in mixing

chamber.

Material supply container

Plugged material inlet or check

valve.

See last section of Service,
page 7. Observe pot life.

Refill, prime system

Clean. Refer to Service.

Air motor (7) malfunction.

Replace.

Refill, prime system.

Clean, refer to Service.

Not enough air pressure or

volume.

Plugged material inlet (31) or
check 

 valve.

Check, adjust.

Clean. Refer to Service.

Drive shaft (18) broken.

Worn or damaged spline shaft

Replace. Refer to Service.

Replace. Refer to Service.

Broken or damaged mixing shaft

Replace. Refer to Service.

Air motor 

 malfunction.

Mixed material won’t flush out.

Hardened material in mixing

chamber 

Solvent supply container empty.

Solvent not compatible with
material.

Replace.

See last section of Service
Observe pot life.

Fill and prime.

Check, correct”

Material leaks around packing re-

Worn or damaged drive shaft

Replace. Refer to Service.

tainer 

packings 

 . .

*Be sure to read and observe the material manufacturer’s literature before using any material 

 system.

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306-94-o