CompAir Classic 05 - Safety Valve; Servicing Vacuum Relief Valve; Testing Vacuum Relief Valve

Refer to Health and Safety section before carrying
out any service work.
Safety Valve
•
Renew bonded seal (18).
•
If the valve (17) is found to be defective, it must be renewed
complete. It cannot be dismantled.
•
Testing the valve for correct lift pressure is described in
Chapter 5 - Adjustments and Testing.
Servicing Vacuum Relief Valve
•
Remove nuts (5) and washers (6).
•
Slide assembly over studs (12) and remove from intake end
cover.
•
On a workbench, dismantle and clean assembly.
•
Renew seal (3) on adjuster screw (1).
•
Renew gasket (7) behind valve cap (4).
•
Renew seal (9) on piston (10).
•
Ensure seal (9) is correctly fitted as shown in inset.Squeezeseal
between finger and thumb. Seal should feel spongy without any
hard spots.If there are use a feeler gauge in the piston groove to
convert seal. Refer to inset.
•
Renew ‘O’ ring (11) on piston.
•
Renew ‘O’ rings (14, 15 & 16) on body. Apply grease to (14) to
hold it in position.
•
Onassembly,screwadjuster screw(1) fully into the valvecap (4).
Then unscrew It 1½ turns before tightening the nut against the
valve cap.
Note: This is only an approximate setting. Further slight
adjustment may be required (see Testing, below) to obtain correct
valve operation.
Testing Vacuum Relief Valve
•
Close air outlet valve and start compressor.
•
Open and close outlet valve.If rattle is heard when outlet valve is
closed, adjustment of vacuum relief valve is necessary. Stop
compressor.
•
Remove air intake filter and filter support.
•
Slacken nut (2). Screw adjuster screw (1) fully in. DO NOT
TIGHTEN.
•
Unscrew adjuster screw (2) two turns.
•
Close outlet valve.Start compressor.Adjust screw (1) until rattle
is eliminated, then tighten nut (2).
Page 28
CompAir Hydrovane
2D Vacuum Relief Valve and Safety Valve
Item Part Number Description Kit
Quantity
All 705 707
32536 Vacuum relief valve assembly 1
1 MG706-40 Grub screw M6 x 40 1
2 MN106 Lock nut M6 1
3 W4-1 Sealing ring KM71 1
4 57794 Vacuum relief valve cap 1
5 MN106 Nut M6 2
6 MWG6 Spring washer M6 2
7 57795 Gasket KM71 1
8 RO20000-79 Spring 1
9 57596 Vacuum valve seal KM71 1
10 RO20000-225 Valve 1
11 52109 ‘O’ Ring KM71 1
12 57849 Stud M6 x 56 2
13 57793 Vacuum relief valve body 1
14 9704 ‘O’ Ring KM71 1
15 9717 ‘O’ Ring KM71 1
16 9715 ‘O’ Ring KM71 1
17a 50054 Safety valve (7 bar models) A/R
17b 50053 Safety valve (8 and 10 bar models) A/R
18 9613 Bonded seal 3/8 KM71 1
A/R = As required