M978 Tanker Maintenance Procedures Instructions (Cont)
Adhesives, solvents, and
sealing compounds can burn
easily, can give off harmful
vapors, and are harmful to
skin and clothing. To avoid
injury or death, keep away
from open fire and use in
well-ventilated area. If
adhesive, solvent, or sealing
compound gets on skin or
clothing, wash immediately
with soap and water.
Apply thread locking compound on threads of valve stem (9).
Install disk holder (10), disk (11), retainer plate (12), lockwasher (13), and disk nut (14) on valve
Install spring (15) and bonnet (16) on valve stem (9).
Make sure bonnet assembly is secure in
clamping device before compressing spring. If
bonnet assembly slips from clamping device
while spring is compressed, injury to personnel
Install bonnet assembly (16) and disk
assembly (10) in suitable clamping
device and compress spring (15).
Spring pin must be securely installed before
removing bonnet assembly from clamping
device. Quick release of spring pressure can
cause serious injury to personnel.
Install spring pin (17) on valve stem (9).
Remove bonnet assembly (16) and disk
assembly (10) from clamping device.