september - october - Fort Sill

RECOIL SYSTEMS
TROUBLE CHART, 155-MM. GUN, FILLOUX—Continued
Trouble Cause Remedy
8. Oil drips from recoil
rod and control rod
stuffing box
Defective packing Arsenal repair
9. Excessive leaks from Sticking of valve. Defective Arsenal repair
recuperator and valve seat
recoil filling and
drain plugs
10. Gun will not return A. Too much oil in the A. Drain and refill recoil mechanism
to battery
recoil system
B. Insufficient air pressure
B. Arsenal repair
11. Gun returns to A. Insufficient oil in recoil A. Refill recoil system
battery with too system
B. Drain and refill recuperator system
great a shock B. Excessive amount of oil
in recuperator
to normal
12. Gun does not recoil A. High viscosity of oil due A. Warming of recoil mechanism by
full distance
to low temperature
firing
B. Scoring
surfaces
of bearing B, C, D. Arsenal repair
C. Increased
packings
friction on
13. Too great recoil
D. Malfunction of control
rod
A. Insufficient oil in recoil A. Refill system to normal
system
B. Insufficient air pressure
C. Insufficient friction of
packings
D. Malfunction of control
rod
B, C. D. Arsenal repair
14. Gun in counter- A. Too close fit of bearing Arsenal repair
recoil has uneven surfaces
jerky motion B. Scoring of bearings
C. Foreign substance in oil
15. Gun in counter- Same as in 14 Arsenal repair
recoil comes to
dead stop then
resumes motion.
16. Gun returns to A. Low viscosity of oil A. Allow system to cool
battery too fast B. Insufficient oil in recoil B. Increase reserve oil to normal
system
C. Reduce reserve oil to normal
C. Too much oil in D and E. Arsenal repair
17. Gun is too slow in
recuperator
D. Malfunction of oil valve
E. Malfunction of buffer
A. Insufficient air pressure Arsenal repair
returning to battery B. Too much friction on
packing
18. Position of A. Piston stuck
A. Tap the piston lightly. Gymnasticate
replenisher does not B. No expansion of oil
piston by pumping in reserve oil
change during
and draining replenisher
firing
B. Requires no correction.
507