mtd_012 w 753

mtd_012 w 753
Service Advisory
MTD-012
(Snow Thrower)
Models Affected:
Model year 2005 500 series (steerable wheel drive) and 600 series (standard wheel
drive) 2-stage snow throwers with plastic handle panels. The model series can be
identified by the fifth position of the model number. (31AE6KQ3766 6 = 600 series)
Serial Number
Range Affected:
Snow throwers manufactured between 6/21/2004 (Date code: “...F214...”) and
9/27/2004 (Date code: “...I274...”)
Date:
12/03/2004
Subject:
Shift Linkage
PROBLEM:
On some snow thrower units under certain operating conditions the
connector sleeve may back up the upper shift rod. This allows the
upper and lower shift rods to unlock and is evident in the inability to
shift speeds. Some units may also experience excessive binding or
flexing of the shift linkage. This may result in difficulties in shifting into
the desired speed or variations in ground speed without shifting.
CORRECTIVE ACTION:
Use service kit 753-04903 (see attached service kit instruction sheet)
ONLY when the connector sleeve will not remain locked down during
normal unit operation or the operator is having difficulty shifting into or
maintaining the desired speed. The revised shift linkage provides a
clamping force on the connector sleeve thereby minimizing the potential
of the shift rods from unlocking. It also improves the rigidity of the shift
linkage to reduce binding and flexing. Service kit 753-04903 replaces
upper shift rod 747-04284, upper shift rod 747-04348, lower shift rod
747-04266 and shift lever 790-00130 identified in the Operator’s Manual
- Illustrated Parts List.
.
** Example of a serial number (1A023H00001) and how to read it.
1 = ENGINEERING LEVEL INDICATOR
A = MONTH OF PRODUCTION; A = January, B = February... H = August... K = November, L = December
02 = DAY OF THE MONTH; 01 = 1ST day of the month, 08 = 8TH day of the month, etc.
3 = YEAR OF PRODUCTION; 2 = 2002; 3 = 2003
H = PLANT CODE.
0 = ASSEMBLY LINE NUMBER.
0001 = DAILY SEQUENCE NUMBER; 0001 = 1st unit produced that day.
Warranty: Normal warranty terms apply. Indicate Service Advisory MTD-012 and 747-04284, 747-04348, 74704266 or 790-00130 (whichever is applicable) as the original failed part on the claim. Repair time allowance is 30
minutes (0.5 hrs.). List model and serial number of the snow thrower.
SERVICE MANAGER
PARTS MANAGER
SALES MANAGER
Circulate and Initial
Page 1 of 1
SERVICE TECH.
SERVICE TECH.
Date: December 16, 2004
Service Kit
753-04903
Subject: : Shift Linkage Replacement
Models 500 series (steerable wheel
Affected: drive) and 600 series (standard
wheel drive) 2-stage snow
throwers; model year 2005
PURPOSE: Service Kit 753-04903 applies to all 500 series (steerable wheel drive) and 600 series (standard wheel
drive) 2-stage snow throwers with plastic handle panels produced between June 1, 2004 and September 27, 2004
for model year 2005.
The model series can be identified by the fifth position of the model number. (31AE6KQ3766
The manufacturing date can be identified by positions two through five of the serial number.
Example: (1G204B10112 G = July, 20 = 20th, 4 = 2004)
6 = 600 series)
This kit should be used to replace the following parts: upper shift rod 747-04284, upper shift rod 747-04348, lower
shift rod 747-04266, shift lever 790-00130
NOTE: Save this Instruction Sheet. Refer to it when ordering replacement parts.
Service Kit Contents
(See Figure A)
REF
NO.
1
2
3
4
5
6
7
8
9
10
11
PART NO.
747-04257
747-04324B
726-0135
712-0421
750-04314
790-00163
712-04064
736-0300
738-04125
732-0193
769-01500
QTY.
1
1
1
1
1
1
1
2
1
1
1
6
DESCRIPTION
7
LOWER SHIFT ROD
UPPER SHIFT ROD
PUSH CAP
WING NUT
CONNECTING SLEEVE
SHIFT LEVER
FLANGE NUT
FLAT WASHER
SHOULDER BOLT
SPRING
THIS INSTRUCTION SHEET
8
10
2
5
1
9
4
3
FIGURE A
Service Kit 753-04903
1 of 4
Form No. 769-01500
Follow these instructions to replace
and adjust the shift linkage.
4. Remove the knob from the top of the shift lever by
rocking it side to side while firmly pulling upward on it.
See Figure 4.
1. Use pliers to remove the push cap which secures the
lower shift rod to the shift arm. Discard the push cap.
See Figure 1.
Reverse Safety Switch
Figure 4
5. Use a 7/16 - inch wrench and a ratchet wrench with a
5/8 - inch socket to remove the hardware that secures
the shift lever to the handle panel. Discard the
hardware. Remove and discard the shift lever.
See Figure 5.
Figure 1
2. Working beneath the handle panel, remove the hairpin
clip which secures the ferrule on the upper shift rod to
the shift lever. Retain the hairpin clip for reassembly
See Figure 2.
Figure 2
Figure 5
3. Remove the shift linkage from the snow thrower.
Remove the ferrule from the upper shift rod. Retain the
ferrule for reassembly. Discard the rest of the shift
linkage. See Figure 3.
Figure 3
Service Kit 753-04903
2 of 4
2
Form No. 769-01500
6. Install the new shift lever into the handle panel. Secure
it using the new shoulder bolt, 2 flat washers, spring
and flange nut. Use a 7/16 - inch wrench and a ratchet
wrench with a 5/8 - inch socket to tighten the
hardware. See Figure 6.
9. Attach the shift linkage to the shift lever by inserting the
ferrule into the hole in the shift lever and securing it with
a hair pin clip. Inset the ferrule from the right hand side
as shown. See Figure 9.
Figure 9
10. Insert the end of the lower shift rod into the shift arm
and secure it with the new push cap using a pair of
adjustable pliers. See Figure 10.
Figure 6
7. Install the knob removed earlier onto the new shift lever
by pushing it down into place. See Figure 7.
Figure 10
11. Place the shift lever in position 6 (forward speed 6).
See Figure 11.
NOTE: If your snow thrower is a Craftsman or has the letter
S or T in the seventh position of the model number, place
the shift lever in position 5 (forward speed 5). example:
31AE5HTG799 See Figure 11.
Figure 7
8. Assemble the new shift linkage as shown. Use the
ferrule removed earlier and note that the holes in the
connecting sleeve are two different diameters. The
large hole slides over the lower shift rod and the small
hole slides over the upper shift rod. See Figure 8.
Figure 8
Figure 11
Service Kit 753-04903
3 of 4
3
Form No. 769-01500
12. Disconnect the shift linkage from the shift lever by
removing the hairpin clip which secures the ferrule and
removing the ferrule from the hole in the shift lever.
Push down on the shift linkage until it stops. Thread the
ferrule up or down the upper shift rod until it lines up
with the hole on the shift lever. Put the ferrule back into
the hole on the shift lever and secure it with the hairpin
clip. See Figure 12.
Figure 12
13. Start the snow thrower and test the shift linkage
adjustment. Place the shift lever in F1 and depress the
drive clutch lever. The unit should drive forward.
Release the drive clutch lever and place the shift lever
in R1. Depress the drive clutch lever and the unit should
drive backwards. The speed should be about the same
in F1 and R1. If it is not, readjust the shift linkage.
Threading the ferrule up the upper shift rod will increase
the speed in F1 and decrease the speed in R1.
Threading it down the rod will decrease the speed in F1
and increase the speed in R1. See Figure 12 and
Figure 13.
Figure 13
Service Kit 753-04903
4 of 4
4
Form No. 769-01500
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