Simplicity Regent Series Owner's manual

How to use this file...(Labels & Miscellaneous Documents)
————————————————————————————————————————————–––
Instructions for
Print Vendors (Paper Manuals)
Paper: * Various...
Press: * Various...
Bindery: * Various...
General: * This instruction page is NOT part of the document and must NOT be printed.
• Pages labeled with the text “THIS PAGE INTENTIONALLY BLANK” are placement pages ONLY,
and should NOT be printed.
• THIS document will most likely be a unique piece -- either a label or certificate or
other such miscellaneous format.
• EXACT specifications on the print & job specs should already be known to
you. In you are uncertain of what these specifications are, please contact
Simplicity Technical Publications.
• (Note: We will do our best to answer your questions concerning this job, but may need to transfer
you to another department within our company for additional specifications and job
requirements).
————————————————————————————————————————————–––
If you have further questions on how to utilize this file, please contact
Simplicity Technical Publications Department at [phone].

THIS PAGE INTENTIONALLY BLANK

Repair Information
Neutral
Adjustments
For Hydrostatic Drive Tractors
Volume I
Fifth Edition (1975 – 1997 Model Year)
Rev. 7/1999
TP 500-1220-06-XX-SMA

MANUFACTURING INC.
500 N. Spring Street / PO Box 997
Port Washington, WI 53074-0997 USA
www.simplicitymfg.com
© Copyright 1999, Simplicity Manfacturing, Inc.
All Rights Reserved. Printed in USA

1
Table of Contents
Page
Section 1. Commercial Front-Cut Riders with Dual Eaton Model 7 Hydrostatic ................................................6
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
CFC Series/Procut 3000 Series
1691969 - 20 HP
1691968 - 20 HP
1691967 - 18 HP
1691966 - 18 HP
1691965 - 16 HP
1691964 - 16 HP
1691846 - 20 HP
1691845 - 20 HP
1691844 - 18 HP
1691843 - 18 HP
1691842 - 16 HP
1691841 - 16 HP
1691975 - 20 HP
1691974 - 18 HP
1691973 - 16 HP
1691972 - 20 HP
1691971 - 18 HP
1691970 - 16 HP
1691882 - 16 HP
1691876 - 18 HP
Section 2. Large-Frame Tractors with Shaft Drive - Sundstrand Model 15
Hydrostatic (Peerless 2600-002 or 2600-008) ........................................................................... 11
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
18 & 20 GTH & SunStar Series 1900 & Ultima Series 2900 Series
1692521 - 18 HP
1692456 - 20 HP
1692454 - 20 HP
1692135 - 20 HP
1692133 - 20 HP
1692131 - 18 HP
1691953 - 20 HP
1691926 - 20 HP
1691924 - 18 HP
1691710 - 20 HP
1691528 - 18 HP
1691381 - 20 HP
1691380 - 18 HP
1691357 - 16 HP
1691250 - 14 HP
1691018 - 20 HP
1691017 - 18 HP
1692523 - 18HP
1692460 - 20 HP
1692458 - 20 HP
1692141 - 20 HP
1692139 - 20 HP
1692137 - 18 HP
1691955 - 20 HP
1691397 - 18 HP
1691392 - 20 HP
1691391 - 18 HP
1691389 - 16 HP
1691387 - 14 HP
1691307 - 18 HP
1691020 - 20 HP
1691019 - 18 HP
1692525 - 18 HP
1692507 - 20 HP 1692505 - 20 HP
Section 3. Large-Frame Tractors with Belt Driven - Sundstrand Model 15 Hydrostatic.................................12
SIMPLICITY
Sovereign, 17GTH-L, AGCO ALLIS MASSEY FERGUSON
7000 & 7100 Series, 7790 900 & 700 Series 2800 Series
1692798 - 18 HP
1692796 - 18 HP
1692450 - 18 HP
1692143 - 18 HP
1691957 - 17 HP
1691717 - 17 HP
1691382 - 16 HP
1690890 - 18.5 HP
1690723 - 14 HP
1690640 - 19 HP
1690638 - 19 HP
1690572 - 17 HP
1690571 - 17 HP
1690570 - 16 HP
1690569 - 16 HP
1690480 - 17 HP
1690479 - 17 HP
1690478 - 16 HP
1690477 - 16 HP
1690473 - 12 HP
1690433 - 18 HP
1690431 - 18 HP
1690429 - 16 HP
1690427 - 16 HP
1690352 - 12 HP
1690342 - 16 HP
1690202 - 16 HP
1690006 - 16 HP
1692847 - 18 HP
1692845 - 18 HP
1692452 - 18 HP
1692144 - 18 HP
1691960 - 17 HP
1691718 - 17 HP
1691383 - 16 HP
1691139 - 18.5 HP
1691124 - 14 HP
1691122 - 16 HP
1690894 - 18.5 HP
1690727 - 14 HP
1690642 - 19 HP
1690575 - 16 HP
1690574 - 17 HP
1690519 - 17 HP
1690516 - 12 HP
1690367 - 18 HP
1690217 - 12 HP
1690214 - 12 HP
1690211 - 16 HP
1690076 - 12 HP
1690014 - 16 HP
1692852 - 18 HP
1692849 - 18 HP
1692503 - 18 HP
1692631 - 16 HP
1692442 - 18 HP
1692440 - 16 HP
1692042 - 16 HP
1692006 - 18 HP 1692633 - 16 HP
1692448 - 18 HP
1692446 - 16 HP
1692044 - 16 HP
1692036 - 18 HP 1692501 - 18 HP
Section 4. Tractors with Tuff Torq K215-A & HydroGear (Sundstrand) Hydrostatic, BDU-21L ........................ 13
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Landlord, 18, 16GTH Series 1700 Series 2700 Series

2
Table of Contents (Continued)
1691732 - 17 HP
1691263 - 16 HP
1691824 - 17 HP
1691766 - 16 HP 1691769 - 16 HP 1691682 - 17 HP
1691560 - 14 HP
1691471 - 16 HP
1691470 - 13 HP
Section 5. Tractors with Eaton 850 Transaxle..........................................................................................................17
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
17, 16GTH & 6500 Series 1800 Series
Section 6. Tractors with Tuff Torq K60 Hydrostatic Transaxle............................................................................18
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Broadmoor, 12.5 & 16LTH Series 1600 Series
1692182 - 14 HP
1692073 - 12.5 HP 1692071 - 16 HP 1692184 - 14 HP
1692076 - 13 HP 1692075 - 16 HP
Tractors with HydroGear 311-0750/311-0800 Transaxle................................................................................................19
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Broadmoor Series 1600 Series 2600 Series
1692776 - 16 HP
1692774 - 15 HP
1692772 - 14 HP
1692609 - 15 HP
1692528 - 15 HP
1692420 - 16 HP
1692416 - 14 HP
1692414 - 14 HP
1692283 - 16 HP
1692279 - 14 HP
1692261 - 12.5 HP
1692432 - 14 HP
1692430 - 14 HP
1692285 - 16 HP
1692281 - 14 HP
1692265 - 12.5 HP
1692813 - 16 HP
1692811 - 15 HP
1692809 - 14 HP
1692613 - 15 HP
1692530 - 15 HP
1692436 - 16 HP
1692499 - 16 HP
1692497 - 14 HP
1692817 - 16 HP
1692815 - 15 HP
Lawn Tractors with Eaton 750 or 751 Hydrostatic Transaxle........................................................................................21
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Broadmoor, 12.5 & 16LTH Series 1600 Series
1691886 - 12.5 HP
1691807 - 16 HP 1691795 - 12.5 HP 1691888 - 13 HP 1691817 - 13 HP
Section 7. Lawn Tractors with HydroGear (Formerly Agri-Fab) Sundstrand BDU10S Transaxle........................... 25
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Regent, 12LT & 12RT Series 500 Series & 612H
1692156 - 12.5 HP
1692053 - 12 HP 1691931 - 12 HP 1692164 - 12.5 HP 1692057 - 12 HP 1691933 - 12 HP
1692788 - 18 HP
1692786 - 17 HP
1692784 - 16 HP
1692576 - 18 HP
1692572 - 16 HP 1692841 - 18 HP
1692839 - 17 HP
1692837 - 16 HP
1692578 - 18 HP
1692574 - 16 HP 1692854 - 17 HP 1692843 - 18 HP
1692580 - 18 HP
Tractors with Hydro-Gear 216-3010L Hydrostatic Transaxle............................................................................................... 15
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Landlord Series 1700 Series 2700 Series
Page

3
Section 8. Lawn Tractors with Eaton Model 7 Hydrostatic & Peerless 1300 Series Transaxle ........................... 30
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
5200 & 4200 Series 600 Series
Table of Contents (Continued)
Section 7. (Continued)
Lawn Tractors with HydroGear 310 - 0500 Transaxle (With Hand Control)..............................................................27
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Regent Series 500 Series 2500 Series
1692403 - 12.5 HP 1692259 - 12.5 HP 1692263 - 12.5 HP1692412 - 12.5 HP 1692495 - 12.5 HP
Lawn Tractors with HydroGear 318-0500/322-0500 Transaxle (With Foot Control) ................................................28
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Regent Series 500 Series 2500 Series
1692354 - 14 HP 1692591 - 14 HP
1692588 - 14 HP
Page
1692835 - 16 HP
1692831 - 16 HP
1691649 - 16 HP
1691473 - 12.5 HP
1691362 - 16 HP
1691340 - 12 HP
1691271 - 12 HP
1691235 - 12.5 HP
1691234 - 12.5 HP
1691033 - 16 HP
1691032 - 16 HP
1691029 - 11 HP
1690936 - 16 HP
1690919 - 16 HP
1690912 - 11 HP
1690881 - 16 HP
1690853 - 16 HP
1690846 - 11 HP
1690810 - 16 HP
1690759 - 11 HP
1691479 - 12 HP
1691477 - 13 HP
1691475 - 16 HP
1691432 - 13 HP
1691276 - 12 HP
1691237 - 13 HP
1691236 - 13 HP
1691044 - 16 HP
1691043 - 16 HP
1691040 - 11 HP
1690960 - 16 HP
1690954 - 16 HP
1690947 - 11 HP
1690887 - 16 HP
1690875 - 16 HP
1690868 - 11 HP
1690763 - 11 HP
Section 9. Later Model Front-Cut Riders with Eaton Model 7 Hydrostatic.......................................................31
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
FC Series Front-Cut 1300 Series Front-Cut 2300 Series
1692375 - 16 HP
1692311 - 16 HP
1692309 - 12.5 HP
1692014 - 12.5 HP
1691656 - 16 HP
1691655 - 12 HP
1692375 - 16 HP
1692312 - 16 HP
1692310 - 12.5 HP
1692022 - 12.5 HP
1691660 - 16 HP
1691659 - 12 HP
1692512 - 16 HP
Section 10. Early Model Front-Cut Riders with Eaton Model 7 Hydrostatic ...................................................32
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
SunRunner Series Vanguard Series
1691331 - 12 HP 1691336 - 12 HP
1692762 - 16 HP
Lawn Tractors with HydroGear 322-0650 Transaxle (With Foot Control) ..................................................................28
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Regent Series 500 Series 2500 Series

4
Section 11. Mid-Engine Riding Mowers with HydroGear 311 - 0500 ................................................................33
SIMPLICITY AGCO ALLIS MASSEY FERGUSON
Coronet Series 400 Series 2400 Series
1692750 - 13 HP
1692515 - 12.5 HP 1692821 - 13 HP 1692519 - 12.5 HP 1692491 - 12.5 HP
1692385 - 12.5 HP
1692130 - 12.5 HP 1692399 - 12.5 HP
1692176 - 12.5 HP
Table of Contents (Continued)
Transmission Purging
This procedure applies to the
following models:
Simplicity - Regent & Coronet Series
AGCO Allis - 500 & 400 Series
Massey Ferguson - 2500 & 2400 Series
The following is a purging procedure for
products that use the Hydro-Gear transmis-
sion. Use this procedure if air has become
trapped in the transmission during shipment,
storage, or during an oil change. Purge the
transmission if it lacks drive in forward or
reverse.
1. Park the tractor on a flat, level surface.
2. Place the hydro release lever in the PUSH
position by pulling rearward on the lever . The
lever is located under the rear right-hand corner
of the frame.
3. Start the tractor engine and run at low idle.
4. Move the ground speed control lever to the
neutral gate.
5. Return the control lever to the neutral gate.
6. Place the hydro release lever (A) in the DRIVE
position by pushing the lever fully forward.
7. Drive the tractor for at least five feet in forward
and reverse directions with full throttle and full
ground speed. Repeat this procedure three times
in the forward and reverse directions.
Repeat the above steps if the tractor has noisy or
erratic operation, lack of performance after
transmission warm up, or oil leakage from
transaxle vent tube.

5
Introduction
■This manual assumes all clutch and brake adjustments have been made, and that
transmission control linkages are in good serviceable condition.
■Worn parts, broken or weak springs, fasteners, and bushings should be replaced as
necessary before attempting to make adjustments.
■It is possible during adjustments to place yourself in a position which is more
hazardous than when the unit is in normal operation.
■Safety is a matter of common sense . . . a matter of thinking before acting.
■Familiarize yourself with the product and pay special attention to all safety warnings.
■Theseadjustmentsaremeanttominimizecreepwhencontrolsareplacedintheneutral
position.
■Hydrostatic transmissions should never be relied upon to hold a tractor in a parked
position. The parking brake should be set and engine stopped whenever leaving the
tractor.
NOTE: PUSHING THE TRACTOR BY HAND
1. Disengage the PTO and turn the engine off.
2. Move the transmission release lever to PUSH position.
Thetractor cannow be pushedby hand. Towingthe tractor withanother vehicleis not
recommended, as the transmission may be damaged.
WARNING
When making adjustment, keep hands, hair, clothing, and tools away from rotating
belts. Careless or improper attention may result in serious injury.

6
Wheel-Steer Adjustments
Neutral
1. Make sure that the steering wheel is spring-
centered in the straight-forward position. If
spring pulls steering wheel off-center, loosen
the nut securing the anchor bolt (G) and move
bolt in slot until wheel is pointing straight
ahead. Retighten nut and recheck steering
wheel alignment.
2. Check the alignment of the rear edges of bars
(I, figure 1-1) and transmission control shafts
(C and D). Rear edges should be aligned as
shown in figure 1-1. To adjust linkage, first loosen
jamnuts (A), remove the nut securing the ball
joint (H), and rotate ball joint until alignment is
correct. Retighten all hardware.
3. Block frame so that wheels are off the ground.
Increase the engine RPM level and move foot
pedal forward and reverse several times. Spring
tension should return foot pedal to neutral.
4. If wheels rotate in neutral, loosen nuts
(B, figure 1-1) on each side of the hydro pump
linkage (F). Turn either front or rear nut until
wheel stops rotating.
5. Tighten nuts, making sure control rods do not
change position. This may take several times to
position rods at exact neutral.
6. Remove frame blocking and test operate.
Rider should not move with foot pedal in
neutral position.
Transmission Speed Variation
If rider pulls to one side with the steering wheel in a
straight forward position, the hydro pump linkage
can be adjusted to correct for unequal pump output.
This adjustment limits the output of a faster hydro
pump at less than maximum forward speed. Refer to
“Forward Travel Stop Adjustment” for maximum
forward speed adjustment.
To adjust hydro pump linkage (A, figure 1-2), loosen
retaining hardware and move linkage upward in slot
(B) to reduce hydro pump output. Retighten flange
locknut (C) after adjustment is complete.
Figure 1-2.
A. Hydro Pump Linkage
B. Adjustment Slot
C. Flange Locknut
Figure 1-1.
A. Steering Linkage Adjustment Nuts
B. Neutral Adjustment Nuts
C. Left Hand Transmission Control Shaft
D. Right Hand Transmission Control Shaft
E. Steering Linkage
F. Hydro Pump Linkage
G. Spring-Centering Bolt
H. Ball Joint
I. Bar
Section 1.
Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic

7
Ground Speed Control
The position and angle of the foot pedal (A, figure
1-3) can be adjusted by loosening taptite screw (B)
and moving pedal in slot. This adjustment should
not affect rider speed or neutral adjustment.
Lever-Steer Adjustments
Control Levers
The control levers have slotted holes for mounting
and can be positioned for the most comfortable
operating position. When in neutral, the handles
should be opposite each other.
To adjust the angle of lever, loosen capscrew
(A, figure 1-4). Adjust lever position and retighten
capscrew. Neutral gate brackets (B) must be adjusted
so that new position of lever will be aligned with
neutral gate (C) when rider is in neutral.
In the operating position, handles should have about
1/2" between them so they will not contact each
other with the weight of the operator’s hands on
handles. To adjust distance, loosen locknut and turn
adjusting bolt (D) in or out. Retighten nut after
adjustment.
After handle adjustment, check the neutral adjust-
ment to make sure there is no creep with levers in
neutral position. Readjust spring-centered lever
position. (Refer to following adjustments.)
Figure 1-3.
A. Foot Pedal
B. Adjustment Capscrew
Figure 1-4.
A. Capscrew
B. Brackets
C. Neutral Gate
D. Adjustment Bolt
Section 1. (Continued)
Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic

8
Neutral
Exact neutral position of transmission control
linkage (A, figure 1-5) can be adjusted by changing
position of linkage on frame bracket (B). With
control levers in neutral position, wheels should not
turn in forward or reverse direction. To adjust
neutral:
1. Block frame up so both drive wheels are off the
ground.
2. Place weight in operator’s seat to start engine.
3. With control levers in neutral gate, start engine
and leave in fast throttle position. If either wheel
turns in forward or reverse direction, perform
steps 4 and 5.
4. Loosen capscrew (C) and nut securing transmis-
sion control linkage (A). Move linkage forward or
backwards until wheel stops moving.
5. Retighten hardware, making sure wheel does not
rotate after hardware is tightened. Repeat steps
for opposite wheel if necessary.
6. Shut engine off and remove weight from seat.
Lower rider to the ground.
Spring-Centered Lever
Control levers should be adjusted so that levers
automatically return to neutral position when
released. Before performing adjustment, make sure
“Control Lever Adjustment” and “Neutral Adjust-
ment” have been performed.
1. Block frame up so both drive wheels are off the
ground.
2. Place weight in operator’s seat to start engine. Do
not start engine.
3. Make sure that “Control Lever Adjustments” and
“Neutral Adjustment” are correct (refer to
preceding adjustments).
4. Loosen spring tension completely on friction pad
(refer to following adjustment).
5. Loosen nut (A, figure 1-6) on top of turnbuckle
(B) and adjust turnbuckle up or down.
WARNING
Do not adjust turnbuckle with engine running.
Hydro pump fan is too close to turnbuckle to
safely perform adjustment.
6. Restart engine and check control lever position.
Move control lever forward and backward and
check if lever returns to neutral position and
wheel does not rotate. If wheel rotates forward,
turnbuckle assembly must be lengthened (turn-
buckle will move down). If wheels rotate back-
wards, turnbuckle assembly must be shortened
(turnbuckle will move up).
Figure 1-6.
A. Nut D. Stationary Spring
B. Turnbuckle E. Friction Pad
C. Tension Spring
Figure 1-5.
A. Transmission Control Linkage C. Capscrew
B. Frame Bracket
Section 1. (Continued)
Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic
7. Repeat turnbuckle adjustment until control lever auto-
matically returns to neutral position. Tighten nut (A)
when adjustment is correct.
8. Tighten spring tension on friction pad (refer to following
adjustment).
9. Remove weight from seat and lower rider to the ground.

9
Friction Pad
The amount of effort required to move control levers
can be adjusted by spring tension on friction pads
(A, figure 1-7). Reducing spring tension will make
the rider more responsive to control lever move-
ment. Increasing spring tension will decrease
responsiveness and prevent rider movement from
becoming jerky, particularly near neutral range.
To adjust spring tension, turn adjusting nut (B) in to
increase tension or turn out to decrease tension.
Transmission Speed Variation
If one transmission is slower than the other with the
same control lever travel, the bracket (A, figure 1-8)
holding the transmission link (B) and friction bar (C)
can be adjusted. The bracket is slotted and is
adjusted by loosening the capscrews (D) and moving
the bracket. Raising the bracket will increase the
transmission speed. This adjustment must be made
by trial and error since the machine cannot be
operated while the adjustment is being made.
This adjustment will not affect lever position, neutral
adjustment, or spring-centered lever adjustment.
Figure 1-7.
A. Friction Pad
B. Adjusting Nut
Figure 1-8.
A. Bracket
B. Transmission Link
C. Friction Bar
D. Capscrews
Section 1. (Continued)
Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic

10
Wheel- & Lever-Steer
Forward Travel Stop
The adjustment bolt (A, figure 1-9) can be rotated to
limit the maximum output speed of each hydro
pump so that the rider will travel in a straight
direction at full forward ground speed. For hydro
output speed variation at less than full forward
position, refer to “Transmission Speed Variation
Adjustment”.
For double-chain reduction models, turn the bolt all
the way out. With ground speed control set to full
forward position, turn the bolt in until it contacts the
frame. Turn the bolt an additional 1/2 turn so that
internal hydro pump components are not used as the
forward travel stop.
For single-chain reduction models, adjust the bolt so
drive wheels are turning 130 rpm maximum.
The left or right adjustment bolt can be turned
inward an additional amount required to limit the
output speed of a faster hydro pump if there is
noticeable difference at maximum forward speed.
If unit is equipped with set collar (C, figure 1-9),
turning the adjustment bolt will affect the reverse
travel stop. (Some early model lever-steer units did
not require set collar.) Perform the “Reverse Travel
Stop Adjustment” to reposition the set collar if
forward travel stop is adjusted.
Reverse Travel Stop
The maximum reverse speed of each hydro pump is
controlled by the position of a set collar (A, figure 1-
10) that limits the travel of hydro input linkage (C).
Adjust the forward travel stop, if necessary, before
adjusting reverse travel stop.
The factory pre-set position of the set collar limits the
reverse speed of rider to 3.5 mph. If the set collar
position is changed due to adjusting the forward
travel stop or service work, set collar (A) should be
repositioned so that there is 1-1/4" (double-chain
reduction models) or 5/8" (single-chain drive
models) between flat washer (E) and frame bracket
with ground-speed control in the full reverse
position.
Figure 1-9.
A. Adjustment Bolt
B. Hydro Input Linkage
C. Set Collar
Figure 1-10.
A. Set Collar D. Capscrew
B. Setscrew E. Flat Washer
C. Hydro Input Linkage
Section 1. (Continued)
Commercial Front-Cut Rider with Dual Eaton Model 7 Hydrostatic

11
Neutral Adjustment
WARNING
Before performing maintenance, lower the attachment,
shutoffengineandremovekey,disengagePTOswitches
and set parking brake.
If the tractor creeps forward or back when ground speed
control lever is in NEUTRAL, adjust as follows.
1. Remove the upper right-hand panel by removing three
screws.
2. Place blocks in front of front tires.
3. Place jack under rear draw bar and raise tractor so that
rear wheels are off the ground. Place jack stands under
axles so tractor is secure.
NOTE: Be sure jack stands do not contact tires.
4. Apply the parking brake.
5. Loosen three nuts (A, B, C). Move the ground speed
control lever fully to rear, then tighten nut (C)
(temporarily).
6. Release the parking brake. Put lever in neutral.
7. Start the tractor engine (hold in seat switch) and apply
full throttle. Move ground speed control lever forward
until wheels rotate forward. Move lever back until wheels
stop turning. Shut off engine.
8. Make sure nut (A) is loose, then apply parking brake.
9. As brake is applied, the cam lever (D) will drop down.
Align spacer on the nut (A) as it drops. Then tighten the
nut (A) being sure no linkage moves while tightening.
Loosen nut (C) and move speed control lever into neutral
gate. Tighten nuts (B and C).
10. To test, release parking brake and start engine. Move
lever fully forward and rearward. Wheels must stop in
neutral. Stop the engine.
11. Reinstall the dash panel.
Figure 2-2.
A. Nut
B. Nut
C. Nut
D. Cam Lever
Section 2. Large-Frame Tractors with Shaft Drive -
Sundstrand Model 15 Hydrostatic (Peerless 2600-002 or 2600-008)
Figure 2-1.

12
Neutral Adjustment
If the tractor creeps forward or back when the hydro-
static control lever is in neutral, adjust as follows:
CAUTION
Always stop engine before leaving operator's
position. Do not perform adjustment with en-
gine running.
1. Park tractor on level ground, make sure hydro-
static control lever is firmly seated in the neutral
notch of quadrant, stop engine and set parking
brake.
2. Raise the seat deck and check if the pump control
arm roller (E, figure 3-1) is exactly centered with
the centering mark (D). If not, loosen bolt (C) and
move the control cam (B) until centering mark (D)
is centered on roller (E). Tighten the bolt (C).
3. Lower the seat deck, get in operator's seat, start
engine and release parking brake. If tractor still
creeps with hydrostatic control lever in neutral,
note which direction it creeps and proceed with
next steps.
4. Stop the engine, set parking brake, and raise seat
deck. Loosen the jam nut (H) on end of cam pivot
shaft (G). If tractor creep had been in reverse,
turn adjusting nut (I) 1/8 to 1/4 turn clockwise
when viewed from right side of tractor. If tractor
creep had been forward, turn nut 1/8 to 1/4 turn
counterclockwise. Lock jam nut, lower seat deck,
get in operators seat, start engine, and release
parking brake. If tractor still creeps, repeat step 4,
turning nut (I) a little at a time until no creep
occurs.
Figure 3-1. Hydrostatic Neutral Adjustment
A. Control Strap
B. Control Cam Assy. F. Pump Control Arm
C. Bolt G. Cam Pivot Shaft
D. Centering Mark H. Jam Nut
E. Pump Control Arm Roller I. Adjusting Nut
Section 3.
Large-Frame Tractors with Belt Driven - Sundstrand Model 15 Hydrostatic

13
Neutral Adjustment (Early Model Only)
1. Park tractor on level surface. Shut off electric
clutch switch and engine. Do not apply parking
brake. Make sure transmission control lever is in
neutral and the hydro release valve is in the
“DRIVE” position.
2. Raise rear of tractor off ground with a suitable
hoist or floor jack. Remove the right-hand rear
wheel. Install safety jackstand underneath right-
hand footrest and block front wheels. Lower the
tractor until the left-hand tire is on the ground.
3. Loosen nut securing shift rod (A, figure 4-1) at
top of speed control lever (B).
4. Loosen nut securing bottom of speed control
lever (C) to support bracket.
5. Loosen nut (D) securing ball retainer (E) to
support bracket.
6. Start engine and run at full throttle.
7. Rotate ball retainer (E) until drive hub rotates in a
clockwise (forward) direction. Turn the ball
retainer back until the drive hub stops rotating.
Ball retainer can be rotated with a pliers or use a
1/4" rod or #2 Phillips screwdriver into hole in
ball retainer.
8. Tighten nut (D) securing ball retainer (E).
9. Depress clutch/brake pedal fully and apply
parking brake. Turn the tractor engine off.
10. Tighten both nuts securing the top and bottom of
the speed control lever (B & C).
11. Release the parking brake and restart the engine.
Run the engine at full throttle and check for drive
hub rotation.
a. Wheel hub (F) may rotate in a counterclock-
wise (reverse) direction due to internal relief
valve. If hub can be held by hand to stop
rotation, adjustment is satisfactory. If hub
cannot be held by hand, loosen the nut (D) and
adjust ball retainer (E) until hub rotation stops.
Retighten nut (D) and recheck for hub rotation.
b. If wheel hub rotates in a clockwise (forward)
direction, loosen the nut (D) and adjust ball
retainer (E) until hub rotation stops. Retighten
nut (D) and recheck for hub rotation.
12. When adjustment is correct, stop the tractor
engine and reinstall the rear wheel. Remove the
tractor from the jackstands.
Figure 4-1.
A. Shift Rod
B. Speed Control Lever (Top)
C. Speed Control Lever (Bottom)
D. Nut
E. Ball Retainer
F. Wheel Hub
Section 4.
Tractors with Tuff Torq K215-A & HydroGear (Sundstrand) Hydrostatic, BDU-21L

14
Late Models - Early Models with 1686602 kit installed
1. Perform neutral adjustment as follows:
a. Put tractor in Neutral. Make sure tow valve is
securely in the drive (UP) position or adjustment
will not be accurate. Lower the tractor so that left
rear wheel is on the ground.
b. Put weight in seat. Start tractor and run engine at
half-throttle.
Note: After installation of kit parts, hardware at locations
B, C, and E, figure 4-2, must be loose before adjustments
are made.
c. Use 3/4" open end wrench to turn hex adjuster (A,
figure 4-2). Turn until rotation of right axle stops.
Tighten nut.
d. Shut off engine. Apply parking brake. Tighten nut
(C) at bottom of speed control lever (D) and then
tighten nut (B) at top of speed control lever.
e. Disengage parking brake and start tractor. Move
the ground speed control lever from Forward and
Reverse into the Neutral gate.
f. If there is minimal rotation of right rear axle,
slightly loosen nut (E, figure 4-2) on hex adjuster.
Turn hex adjuster just slightly (turn counterclock-
wise to correct forward rotation and turn clockwise
to correct reverse rotation) until axle stops.
If there is more than slight rotation of rear axle,
repeat steps a-d.
g. Move the ground speed control lever from Forward
and Reverse into the Neutral gate by depressing the
brake pedal (return-to-neutral pedal). Check that
the shift control lever drops into the neutral gate on
dash and that there is no rear axle rotation . Note
that slight rearward (counterclockwise) rotation of
axle will stop within a few seconds. This small
amount of rotation will not cause tractor creeping
and does not require adjustment.
h. When adjustment is correct, tighten adjustment nut
(E) to 70-75 in. Ibs.
2. Make sure all hardware is tightened on installed
kit parts.
3. Reinstall rear wheel.
4. Remove jackstands and lower tractor.
5. Start tractor and check operation of shifting linkage
and return-to-neutral. Readjust neutral as required.
*2518
Figure 4-2.
A. Hex Adjuster
B. Top Nut Location
C. Bottom Nut Location
D. Speed Control Lever
E. Nut
Section4.(Continued)
Tractors with Tuff Torq K215-A & HydroGear (Sundstrand) Hydrostatic, BDU-21L

15
Section 4. (Continued)
Tractors with HydroGear 216-3010L Hydrostatic Transaxle
Perform the following adjustment if the shift lever must be
moved out of the neutral gate to prevent forward or reverse
tractor movement. (With the clutch/brake pedal released, a
small amount of travel in the shift lever may be required to
fully stop tractor.)
1. Position unit on flat, level ground. Make sure the shift
lever is positioned in the neutral gate.
2. Raise the rear of tractor off ther ground, and support it
securley with jackstands so that the rear wheels are free to
rotate.
3. Start the unit and move the shift lever until the rear
wheels stop moving. Shut off tractor engine, leaving shift
lever in position.
Neutral Adjustment
WARNING
When Making adjustment, keep hands, hair, clothing, or
toolsaway from rotatingbelts. Grasp camlever at baseto
keep hand several inches below belt rotating around
idler pulley assembly. Careless or improper attention
any result in serious injury.
4. Loosen nut (A, Figure 4-3) securingthe front shift rod (E) to
the idler pivot assembly (B) and rear shift rod lever (C).
The front shift rod must be free to move without disturb-
ing the position of the rear shift rod (C).
5. Move the shift lever so that it is positioned in the neutral
gate.
6. Tighten nut (A) securely.
7. Check operation of unit for any movement with shift lever
in neutral gate. Perform the return-to -neutral adjustment
(refer to next page).
Figure 4-3 Neutral Adjustment
A. Nut
B. Idler Pivot Assembly
C. Rear Shift Rod
D. Idler Arm Assembly
E. Front Shift Rod
Viewed From Bottom Looking Up
E
D
C
➜
FRONT
V-Pulley
Flat Idler
Pulley

16
Return-to-Neutral Adjustment - Hydro
See figure 4-4. Perform the following adjustment if the shift
lever does not return to the neutral gate from a forward gear
position when the clutch/brake pedal is fully depressed.
1. Make sure the Neutral Adjustment is correct (refer to
preceding page).
2. Loosen the nut (A) that secures the rear shift rod (B) to the
return-to-neutral cam (C).
3. Hold the clutch/brake pedal fully down against the right
footrest. (Pedal can be clamped in this position with large
C-clamp if required.) Do not apply parking brake to hold
pedal, as pedal will not be held fully against footrest
without free play.
Section 4. (Continued)
Tractors with HydroGear 216-3010L Hydrostatic Transaxle
Figure 4-4. Return-to-Neutral Adjustment
A. Nut D. Front Clutch Rod
B. Rear Shift Rod E. Front Shift Rod
C. Return-to-Neutral Cam F. Idler Arm Assy
Viewed From Bottom Looking Up
➜
FRONT
E
E
Contact
Point
4. See Figure 4-5. Position shift lever just below neutral gate -
shift lever shaft should be centered on corner at start of
reverse slot.
5. Rotate the return-to-neutral cam (C) securely against the
front clutch rod (D). There should be no gap between the
clutch rod and cam at the contact point.
6. Tighten nut (A) with pedal still held down against the
footrest.
7. Remove clamp from pedal. Start tractor and check return
to neutral operation. With pedal released, a small amount
of travel in the shift lever may be required to fully stop
tractor.
Figure 4-5. Proper Shift Lever Position For Return-to-Neutral
Position
Flat Idler
Pulley
V-Pulley