Rammer Repair
Ramming System
wc_tx001547gb.fm
103
5.5
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.
5.5.1
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.
5.5.2
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, BS 50
194 mm (7 21/32 in.)
5 mm (3/16 in.)
BS 600, BS 60
BS 700, BS 70
BS 650, BS 65V
DS 720, DS 70
217 mm (8 9/16 in.)
5 mm (3/16 in.)
wc_gr001329rm
a
b
Summary of Contents for BS 50
Page 8: ...8 wc_br0114549en_11TOC fm Table of Contents Rammmer Repair 10 16 DS 70 148 10 17 DS 720 150...
Page 26: ...Maintenance Schedules Rammer Repair 26 wc_tx001545gb fm Notes...
Page 48: ...Engine and Upper Machine Components Repair 48 wc_tx001546gb fm a wc_gr003705 a a b b c c b...
Page 54: ...Engine and Upper Machine Components Repair 54 wc_tx001546gb fm wc_gr001313rm a b d e c f...
Page 56: ...Engine and Upper Machine Components Repair 56 wc_tx001546gb fm e b c d wc_gr004562 a g f...
Page 61: ...Repair Engine and Upper Machine Components wc_tx001546gb fm 61 w c _ g r 0 0 1 3 1 5 r m...
Page 70: ...Engine and Upper Machine Components Repair 70 wc_tx001546gb fm wc_gr002935 d a b e c d...
Page 82: ...Engine and Upper Machine Components Repair 82 wc_tx001546gb fm w c _ g r 0 0 1 3 1 7 r m...
Page 84: ...Engine and Upper Machine Components Repair 84 wc_tx001546gb fm BS Models...
Page 94: ...Ramming System Rammer Repair 94 wc_tx001547gb fm Notes...
Page 98: ...Ramming System Rammer Repair 98 wc_tx001547gb fm wc_gr001325rm Threaded Rod Method...
Page 114: ...Crankcase Rammer Repair 114 wc_tx001548gb fm Notes...
Page 121: ...Rammer Repair Oil Injection if equipped wc_tx001549gb fm 121 wc_gr001526 a b c d...
Page 123: ...Rammer Repair Oil Injection if equipped wc_tx001549gb fm 123 wc_gr001527 a b...
Page 147: ...Rammer Repair Technical Data wc_td000112gb fm 147 Notes...