SMC Networks VBA10A Maintenance Manual page 5

3. Maintenance of governor
◆ ◆ ◆ ◆ Necessary tools◆ ◆ ◆ ◆
Phillips screwdriver
Pair of needle nose pliers
◆ ◆ ◆ ◆ Disassembly◆ ◆ ◆ ◆
1) Check air pressure is exhausted from the IN and OUT sides.
2) Rotate the handle counterclockwise back to the end (in the negative direction).
3) Remove four cross recessed round head screws (12) with the Phillips driver.
4) Remove the bonnet assemblies (10) and (11), the regulating screw assembly (9), the regulating spring
(8), the regulating piston assembly (7), the relief spring (6), and the relief valve (5).
5) Remove the governor chamber assembly (4), the valve assembly (3) and the valve spring (2) with a pair
of needle nose pliers.
◆ ◆ ◆ ◆ Maintenance and check◆ ◆ ◆ ◆
1) Check there is no abrasion, deterioration and deformation of any part. If there is, replace it with new one.
2) If there is any part whose motion is not smooth, wipe off dirt and apply grease.
◆ ◆ ◆ ◆ Reassembly◆ ◆ ◆ ◆
1) Mount the valve spring (2) and the valve assembly (3) to the body (1), and then fit the governor chamber
assembly (4) to the body.
2) Mount the relief spring (6) and the relief valve (5) to the regulating piston assembly (7), and then, put
them into the governor chamber assembly (4). Put the regulating spring (8) and the regulating screw
assembly (9) on them.
3) Put on the bonnet assemblies (10) and (11) and tighten them with four cross recessed round head
screws (12) using the Phillips screwdriver. (Torque: 0.76Nm)
◆ ◆ ◆ ◆ Check◆ ◆ ◆ ◆
1) Check the cross recessed round head screws (12) are
tightened and supply air.
2) When air pressure is supplied, it will start to relieve air.
Quickly rotate the handle in the clockwise direction (in
the positive direction) until it stops relieving air.
3) Check pressure setting to the necessary pressure can
be performed with the handle.
4) Check there is no leakage from connected parts with
soapy water.
※ Maintenance of the governor can be
performed without removing the cover part.
Fig.3
- 4 -
(12)
(11)
(10)
(9)
(8)
(7)
(6)
(5)
(4)
(3)
(2)
(1)