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TM5-4210-229-14&P
5-7.
RESCUE SAW REPAIR (Continued).
(3)
Check carburetor valves and seats for wear,
scoring, or other damage.
(4)
Check carburetor body for cracks, clogged
passage and worn bushings.
(5)
Check throttle shaft (210) and choke shaft
(212) for wear on bearing surfaces, distortion
or other damage.
(6)
Inspect fuel pump diaphragm (192) for
damage on the flaps and for signs of leakage.
Inspect main diaphragm (178) for leaks,
looseness and wrinkles.
(7)
Using a tachometer, check that engine speed
is 6500 rpm while throttle in full speed
position and that clutch engages belt and
blade at approximately 3200 rpm. Warm
engine thoroughly and adjust full-throttle
speed and idle speed which should be a little
faster than necessary to rotate blade cutter.
ASSEMBLY
a.
Rescue Saw Carburetor Assembly.
(1)
Insert spring (213) with ball (214) into
carburetor body. Insert choke shaft (212)
through carburetor body and attach choke flap
(211) into shaft with screw (210).
(2)
Assemble spring (209) with two bushings
(207) and seal (206) onto shaft (210). Install
shaft (210) into carburetor body and secure
with seal (205), washer (204) and lock ring
(203). Install throttle flap (202) onto shaft
(210) with screw (201).
(3)
Install niple (194) and idle screw (195)with
nylon ball (196).
Do not screw down the jet adjustment screws
hard since this can damage the seats.
(4)
Install high speed adjust screw (197) with
spring (198) and low speed adjust screw (199)
with spring (200).
(5)
Install strainer (193), diaphragm (192), gasket
(191), fuel pump cover (196) and secure with
four screws (189).
(6)
Install seal (188) and governor (187).
(7)
Install washer (185), valve (186), and inlet
needle valve (184).
(8)
Install spring (183), lever spindle (182), lever
(181) and screw (180).
(9)
Install gasket (179), diaphragm (178), and
cover (177) and secure with four screws (176).
b.
Rescue Saw Assembly.
(1)
Warm both halves of the crankcase. Grease
the
main
bearings
(171)
using
grease
(Appendix
D,
Item
22)
and
install
on
crankshaft assembly (167). Install seals (99
and 173) and hub (100). Install crankshaft
(167) and cylinder pin (170) in left hand half
crankcase. Apply adhesive (Appendix D, Item
48) to both sides of crankcase gasket (169)
which is held in position by cylinder pin (170).
Assemble the two crankcase halves (175 and
172) together and secure with screws (166
and 174). Install needle bearing (98) on
clutch end of crankshaft and needle bearing
(168) in connecting rod.
(2)
Assemble fuel hose (164), sleeve (163),
nipple (162), hose (161), strainer (160), vent
kit (159) and filter (158) onto tank (165).
(3)
Install tank into crankcase and complete
assembly by installing O-ring (157) and cap
(156).
(4)
Install piston (154) onto connecting rod with
pin (153) and two lock rings (152). Install two
rings (155) onto piston (154). Thoroughly oil
piston (Appendix D, Item 37) and rings.
Compress
rings
with
a
suitable
ring
compressor and install gasket (151) and
cylinder (150) with four screws (148) and four
nuts (149).
(5)
Install contact spring (146) with screw (145).
(6)
Install stop button (143) in left bracket (137)
and choke button (142) in right bracket (134)
and secure with pins (144). Connect choke
rod (67) to choke button (142).
5-18
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