Marshalltown SP684 SURFACE SHARK Surface Planer - Manual (Page 38)

PAGE 38 SP684 SuRFACE ShARK SuRFACE PLANER
threaded area before applying the lubricant. Do not
lubricate the threads with any type of grease material.
Grease will attract foreign material accumulations that
can accelerate component wear. Place the rubber boot
in its original location and tighten the retaining clamp.
Do not operate the Surface Planer without the protective
rubber boot in its intended location. operation without
the rubber boot or a boot in an improper position will
accelerate component wear by allowing materials
to accumulate in the screw thread area of the crank
handle.
ALIGNING THE CASTER WHEELS
Application: SP684 SURFACE SHARK
Tools Required:
1 each, 16 inch minimum length straightedge
2 each, 3/4 inch wrenches
1 each, torque wrench, 85 ft lbs (115 Nm.) capacity
with 3/4 inch socket
1 each, 6 inch scale
Proper front and rear caster wheel alignment is essential
to produce an even cutting action by the flails. With
use, caster bearings and axles will eventually wear.
Excessive caster bearing and axle wear can contribute
to an uneven cutting action. In addition, a sharp blow
delivered to the Surface Planer (eg; being dropped to
the surface from off a truck) can also affect the caster
wheel alignment.
Caster wheels are aligned during assembly with
the use of a specially designed alignment jig.
However, satisfactory results can also be achieved
in the field by following steps:
1) Position the Surface Planer on a suitable work
surface. If the Surface Planer is powered by an engine
and the engine is not to be removed, fuel and oil must
be first drained from the fuel tank and crankcase. If
powered by an electric motor, disconnect the extension
cord or Surface Planer from the power source. The
normal position for aligning the caster wheels is with
the main frame perpendicular to the work surface.
Support the unit with proper blocking.
2) Shim washers of .015 inch (.381 mm) thickness
are sometimes utilized when fastening the front axle
assembly to the main frame. Install washers as
required. FIGuRE 46. The fasteners that attach the front
axle assembly should be tightened until slight tension
is applied. Always position the 1/2 inch flat washers
against the slots provided in the axle assembly.
FIGuRE 46
3) Position the front casters so that their faces extend
approximately 7/16 inch (11.1 mm) beyond the bottom
surface of the main frame. Caster wheels have a slight
curvature on their faces. The measurement should be
taken at the high point of the curvature, FIGuRE 47.
4) Push the rear casters towards the main frame until
the upper limit stop is encountered. FIGuRE 48.
FIGuRE 47
5) Place the straightedge between the front and rear
casters on the high point of the face curvature. Adjust
the front casters so that the gap between the straight-
edge and the bottom of the main frame is identical. This
gap figure is approximately 1/8 to 1/4 inch (3.17 to