Ramming System
Rammer Repair
wc_tx000286gb.fm
76
4.5
Inspecting the Spring System
See Graphic: wc_gr001329rm
Over time, the constant compression and release of the spring
pressure can cause the springs to wear out. If the rammer feels to be
hitting with less force, it is possible that the springs are worn and
should be replaced.
A broken spring causes the rammer to jump erratically. This condition
is more noticeable on hard soils. Do not run the rammer if a broken
spring is suspected. Doing so may damage other rammer parts.
Replace both the top and the bottom spring sets even if only one set is
worn or damaged.
4.5.1
Remove the springs from the cylinder and check them for minimum
spring free height and maximum spring height difference per the table
below. Replace the springs if they do not meet the given specifications.
4.5.2
If a spring has broken, inspect the inside of the spring cylinder wall for
burrs, gouges, and cracks as follows:
•
Slide the piston guide inside the cylinder. Check that the piston
guide moves freely but without excessive side play.
•
Hone the cylinder to remove the ridges and the burrs that were
cut into the cylinder wall by the spring movement.
•
Replace the cylinder if it is badly worn.
Minimum spring free
height
(a)
Maximum spring
height difference
(b)
BS 500
194 mm (7 21/32 in.)
5 mm (3/16 in.)
BS 600
BS 700
BS 650
DS 720
217 mm (8 9/16 in.)
5 mm (3/16 in.)
wc_gr001329rm
a
b
Summary of Contents for BS 50-4
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Page 27: ...Rammer Repair General wc_tx000284gb fm 27 Notes ...
Page 29: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 29 ...
Page 41: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 41 wc_gr001313rm a b d e c f ...
Page 43: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 43 e b c d wc_gr004562 a g f ...
Page 47: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 47 w c _ g r 0 0 1 3 1 5 r m a c b d ...
Page 49: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 49 wc_gr002935 d a b e c d ...
Page 53: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 53 w c _ g r 0 0 1 3 1 7 r m a ...
Page 57: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 57 c a b wc_gr001319rm DS 720 Models ...
Page 59: ...Rammer Repair Guide Handle and Engine wc_tx000285gb fm 59 DS 70 Models wc_gr002372rm a b c ...
Page 69: ...Rammer Repair Ramming System wc_tx000286gb fm 69 wc_gr001324rm Hydraulic Press Method ...
Page 71: ...Rammer Repair Ramming System wc_tx000286gb fm 71 wc_gr001325rm Threaded Rod Method ...
Page 81: ...Rammer Repair Ramming System wc_tx000286gb fm 81 Notes ...
Page 84: ...Crankcase Rammer Repair wc_tx000287gb fm 84 wc_gr001333rm p o n m f ...
Page 93: ...Rammer Repair Oil Injection if equipped wc_tx000288gb fm 93 wc_gr001527 a b ...
Page 115: ...Rammer Repair Technical Data wc_td000112gb fm 115 NOTES ...
Page 120: ...Technical Data Rammer Repair wc_td000112gb fm 120 ...
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