Schwing 30100750, Руководство по эксплуатации

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Maintenance
All S P Rock Valve Model s
Startup 250:Users:Danny:Desktop:Operation manuals:line
pumps:All SP Rock Valve models:Frame files:Maintenance.fm
Operation Manual -
107
• Rotate the cutting ring. Actually, this is more
dependent on the type of concrete and the
number of cubic yards pumped than on a time
schedule, but you should check it for wear at
least once per week, and rotate it as needed. To
rotate:
a. First shut off the engine and put the key in your
pocket
b. Raise hopper grate and secure with “T” bolt.
c. Loosen the tension nut Figure 48.
d. Loosen the 8 cover bolts a couple of threads,
but do not remove the bolts.
e. Loosen the 12 x 35 bolt on the end of the rock
shaft by the slewing lever.
f. The rock valve will slide far enough out for
you to rotate the cutting ring 90
°
.
g. Remove the hopper grate.
h. From inside of the hopper, tap the cutting ring
forward, towards the spectacle plate. The ring
should pop loose (if not, loosen the cover bolts
a little more, then gently pry the rock valve
rearwards a little more). Rotate the ring 90
°
clockwise. It doesn’t really matter which way
you rotate, but to keep from forgetting which
way you went last time, we recommend going
clockwise each time. That way the rotation
will always bring up a new side.
i. Be sure that the ring is centered in the rock
valve. Tighten the cover bolts slightly, if
needed, to be sure that the ring isn’t cocked
one way or the other.
j. Be s u re there is no d ebris between the b a ck
co v er a n d the rock va l v e ho u sin g (if so,
cle a n it o u t). Tighten the cover bolts just
enough to bring the back plate up against the
rock housing. Then tighten each bolt equally,
using a torque wrench. Alternate which bolts
you tighten, like you would when tightening a
wheel on a car. The torque specs for these bolts
(M20 x 65, 8.8 hardness) is 300 foot/lbs.
k. Lower the hopper grate and secure it with the
grate lock.
l. Tighten the tension nut according to the
instructions in 5.2-1. Tighten the keeper bolt.
Lubricate mechanical moving parts with oil, or a
WD-40 type of lubricant.
• Drain the moisture from the fuel filter at least
once per week. On the bottom of the fuel filter
is a drain cock, drain until moisture ceases to
come out. Also drain the water out of the
bottom of the fuel tanks. Using the drain cocks
on the bottom of the fuel tanks.
Monthly maintenance
• Check the mounting hardware of the subframe,
the oil tank, the pump kit, the differential
cylinders, and the material cylinders. Check
for bolt tightness, cracks and other
abnormalities.
• Check all hydraulic pressures. The
specifications for each circuit are shown below,
and on the hydraulic schematic that applies to
that circuit. The schematics are all contained in
the Appendix section of this manual. Changes
in pressures may indicate trouble in one or
more components, and will serve as early
warning indicators IF you check them on a
regular basis. PRESSURE SETTINGS MUST
BE MADE WITH THE OIL AT NORMAL
OPERATING TEMPERATURES (40
°
to 60
°
C). To heat the oil to operating temperature:
a. When the oil is very cold (at or below the pour
point of your hydraulic oil),
• Bring engine RPM to a n idle.
• Let the engine idle u ntil the temp. g au ge
on the oper a tor’ s p a nel re a d s 20
°
.
b. When the oil is warm (above the pour point of
your hydraulic oil), follow instructions a.
through g below. Shut off the concrete pump
when the oil shows 40
°
C on the temperature
gauge of the operator’s panel.
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