Modern AG 20' Predator - Manual (Page 70)

70 - 20’ Predatorrr
MaintEnancE
HydRaUlic HoSES
Replace pinched and broken Hydraulic Hoses at once. tighten any hydraulic fitting with fluid leaking
from it. If fluid still leaks, loosen the fitting, apply a pipe thread compound to the threads and
tighten. Care must be exercised when tightening hydraulic fittings. too much tightening can cause
the fittings to crack and required replacement fittings.
although a small amount of oil will be present from bleeding at all hydraulic fittings, significant
leaking around the Breather Plug on the cylinder is damaged or too much hydraulic fluid is lost.
SKid SHoES
Skid shoes are made od carbon steel to reduce wear and increase service life. Premature wear can
be caused by the cutter wing sections being set too low which allows the wing skid shoes to drag
on the ground. Dragging the skid shoes on the ground or running the skid shoes into solid objects
can contribute to early frame failure on the cutter. Replace worn skid shoes as required.
wHEElS BEaRingS
every six months, the wheel hubs should be removed. Remove, clean, and inspect the bearings
making certain that they are free of all signs of pitting, rust decay, or deformation. If any of these
problems exist, the cups and cones in the wheel hub should be replaced. Replace the cups and
cones as a set. this prevents a continuation of the original problem. If the bearings are in good
shape, pack then with grease.
Put the bearing seal back into the wheel hub
and replace the hub. tighten the adjusting nut
until there is noticeable drag while turning the
wheel. Back of just enough to provide a free-rolling
fit. Insert and spread the Cotter Pin. Install the hub
cap. Fill the hub completely with #2 bearing grease.
HaRdwaRE
Check nuts, bolts, and other miscellaneous
hardware regularly. Loose hardware is easily
lost, cause increased wear on parts, and increase
the chance of breakdown. Loose hardware creates
potential hazards which could result in personal
injury to the operator, support personnel and
bystanders. use the “torque Chart” below when
tightening bolted connections.
Bolt Plain tHREE Six
diaMEtER HEad daSHES daSHES
1/4 . . . . . not used . . . . . . . 10 (14) . . . . . . . . . .14 (19)
5/16 . . . not used . . . . . . . .20(27) . . . . . . . . . . 30(41)
3/8 . . . . not used . . . . . . . .35(47) . . . . . . . . . . 50(68)
7/16 . . . . . .35(47) . . . . . . . .55(75) . . . . . . . . . 80(108)
1/2 . . . . . . . .55(75) . . . . . . 85(115) . . . . . . . . 120(163)
9/16 . . . . 75(102) . . . . . 130(176) . . . . . . . . 175(237)
5/8 . . . . . 105(142) . . . . . 170(230) . . . . . . . . 240(325)
3/4 . . . . . 185(2510 . . . . . 300(407) . . . . . . . . 425(576)
7/8 . . . . . 160(217) . . . . . 445(603) . . . . . . . . 685(929)
1 . . . . . . 250(339) . . . . . 670(906) . . . . . . 1030(1396)
1 1/8 . . . 330(447) . . . . 910(1234) . . . . . . 1460(1979)
1 1/4 . . . 480(651) . . . 1250(1695) . . . . . . 2060(2793)
2 (B) 5 (D) 8 (F)
REcoMMEndEd toRQUE
in ft-lBS (nM)
coaRSE and finE tHREadS