Briggs Stratton Lawn Mower 1687077 page

44” Roller Bar Mower Kit  
Part No. 1687077  
Installation  
For Conquest / 1700 / 2700 / YT / Broadmoor / 1600 / 2600 / LT  
Instructions  
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Figure 1. Kit Contents: 1687077  
Ref Part No. Qty. Description  
11 1931352  
12 1731383A 2  
13 1919381  
14 1731384  
15 1731383  
16 1704080  
17 1733521A 1  
18 1930644  
19 1602946  
1
CARRIAGE BOLT, 3/8-16 x 1-1/2  
CAPSCREW, Hex, 5/16-18 x 1-1/2  
WASHER, 5/16  
LOCKNUT, ESNA, 5/16-18  
CHAIN, 2 Link  
PLATE, Support  
ROCKER SHAFT 44 Mower  
LOCKNUT, 1/2-13  
1
2
3
4
5
6
7
8
9
1716159A 1  
ROLLER BAR, 44 Mower  
LOCKNUT, Top Lock, 3/8-16  
SLIDE  
WASHER, 1/2  
BOLT, Shoulder, 3/8-16 x 11/32  
2860681  
1677507  
1924361  
2172622  
2
1
1
1
4
2
2
1
1924366 10 WASHER, 5/8  
1722036  
1960520  
1668513  
2
2
7
ROLLER  
PUSH NUT, 5/8  
ROLLER  
BAR  
2
2
SPACER  
10 1704074A 1  
WARNING  
Before beginning any service work turn off the  
PTO, set the parking brake, turn off the ignition,  
and disconnect the spark plug wire(s).  
This kit is is to convert a frame hung mower to a  
roller bar mower.  
1
Roller Bar Mower Kit  
Installation Instructions  
O
E
P
U
B
V
F
B
U
C
A
Q
X
W
G
B
S
T
D
Y
B
W
H
I
Z
R
B
V
J
A
K
N
M
L
Q
Figure 3. Installation 44” Rollers  
A. Capscrews, 5/16-18 x 1-1/4  
B. Washer, Large, 5/16  
C. Indicator  
D. Mower Support Plate  
E. Crank & Trunnion Assembly  
F. Capscrew, 5/16-18 x 1-1/4  
G. Arm  
I. Nut & Lockwasher  
J. Hair Pin  
K. Clevis Pin  
L. Adjustment Rod  
M. Rocker Arm Assembly  
N. Straps  
R. Carriage Bolt, 3/8-16 x 1-1/2  
S. Washer, Small, 5/16  
T. Upstop  
U. Capscrew, 5/16-18 x 1-1/2  
V. Chain, 2 Link  
W. Locknut, 5/16-18  
X. Slide  
Y. Washer, 1/2  
O. Locknuts, 1/2-13  
P. Roller Bar Assembly  
H. Height of Cut Plate  
Q. Eccentric & Locknut, 3/8-16  
Z. Shoulder Bolt, 3/8-16 x 1-11/32  
5. Connect the LH side roller bar assembly (P) to LH  
side of rocker arm assembly (M) securing with 3/8-16  
x 1-1/2 carriage bolt (R) and eccentric & 3/8-16 lock-  
nut (Q).  
INSTALLATION 44” ROLLERS  
1. Attach the rocker arm assembly (M, Figure 3) to the  
mower deck with the straps (N), washers (S), upstop  
(T), and capscrews (A). Apply a thin film of grease to  
the inside of the straps.  
6. Connect the LH side roller bar assembly (P) to LH  
side of mower deck securing with 3/8-16 x 1-11/32  
shoulder bolt (Z), 1/2 washer (Y), slide (X), and 3/8-  
16 locknut (Q).  
2. Attach the chains (V) to the rocker arm assembly (M)  
using 5/16-18 x 1-1/2 capscrews (U), washers (Y),  
and 5/16-18 locknuts (W) as shown.  
7. Attach height of cut plate (H) to rocker arm assembly  
(M). Secure with 5/16-18 x 1-1/4 capscrews (F) and  
nuts & washers (I).  
3. Place upper trunnion on crank & trunnion assembly  
(E) through hole in rocker arm assembly (M) and  
roller bar assembly (P) as shown. Secure with 1/2-13  
locknut (O).  
8. Attach the mower support plate (D) and indicator (C)  
to mower deck. Secure with 5/16 washer (B) and  
5/16-18 x 1-1/4 capscrews (A).  
4. Place lower trunnion on crank & trunnion assembly  
(C) through hole in mower deck and roller bar assem-  
bly (P) as shown. Secure with 1/2-13 locknut (O).  
9. Attach adjustment rod (L) to rocker arm assembly (M)  
using clevis pin (K) and hair pin (J).  
3
Installation Instructions  
Roller Bar Mower Kit  
MOWER DECK REMOVAL &  
INSTALLATION  
A
B
C
Chain Lift Models  
D
WARNING  
Engage parking brake, disengage PTO, stop  
engine and remove key before attempting to  
install or remove the mower.  
Figure 4. Mower Lift  
A. Lift Hook  
B. Lift Chain  
C. PTO Belt  
D. Idler Arm  
Muffler and surrounding areas may be hot.  
Removing the Mower Deck  
1. Park the tractor, fully lower the attachment lift, turn off  
the PTO, turn off the engine, remove the key, and  
engage the parking brake. If equipped, pivot the  
gauge wheels into sliding position.  
2. Place mower in the lowest cutting position using the  
mower height control.  
3. Use the idler arm (D, Figure 4) to release tension on  
the PTO belt, and remove belt from the PTO pulley.  
4. Pull down on the lift hooks (A, Figure 4) and unhook  
CAUTION  
The muffler and surrounding areas may be hot.  
the lift chains (B).  
5. Turn the wheels straight ahead. Pull back on spring-  
loaded lever (B, Figure 5) and lift mower hitch off of  
the tractor brackets (A).  
6. Turn wheels fully left, and slide mower deck out from  
under the right side of the tractor.  
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Roller Bar Mower Kit  
Installation Instructions  
Installing the Mower Deck  
NOTE: Perform mower installation on a hard, level sur-  
face such as a concrete floor.  
A
1. Park the tractor, fully lower the attachment lift, turn off  
the PTO switch, turn off the engine, remove the key,  
and engage the parking brake. Turn the wheels fully  
to the left.  
2. Place mower in the lowest cutting position using the  
mower height adjuster. Slide the mower deck under  
the right side of tractor so that the mower hitch is  
aligned with front tractor hitch (A, Figure 5).  
B
3. See Figure 5. Turn wheels straight. Pull back on the  
spring-loaded lever (B) while lifting up on the mower  
hitch. Install the mower hitch onto tractor hitch brack-  
ets (A). When properly installed, the spring-loaded  
lever should seat fully underneath the brackets (A).  
Figure 5. Mower Hitch  
A. Tractor Hitch Brackets  
B. Spring-Loaded Lever  
4. See Figure 4. Connect the mower lift chains (B) to  
the the tractor lift hooks (A).  
NOTE 50” & 54” Mowers: The two-link lift chain is bolted  
to the mower deck using the second link. This is correct  
for most mowing applications.  
5. See Figure 4. From left side of tractor, use the idler  
arm (D) to relieve belt tension. Install belt (C) onto the  
PTO pulley.  
5
Installation Instructions  
Roller Bar Mower Kit  
Leveling The Mower  
If the cut is uneven, the mower may need leveling.  
Unequal or improper tire pressure may also cause an  
uneven cut. Make sure tire pressure is correct as speci-  
fied in Checking Tire Pressure.  
A
B
SIDE-TO-SIDE LEVELING  
1. With the mower installed, place the tractor on a  
smooth, level surface such as a concrete floor. Turn  
the front wheels straight forward.  
2. Check for bent blades and replace if necessary.  
3. Place the mower in mid-cut position. Arrange the out-  
side mower blades so that they are pointing from  
side-to-side.  
Figure 8. Leveling The Mower Side-to-Side Eccentric  
Nut Models  
A. Outside Nut  
B. Eccentric Nut  
4. Measure the distance between the outside tips of  
each blade and the ground. If there is more than 1/8”  
(3mm) difference between the measurements on  
each side, proceed to step 5. If the difference is 1/8”  
(3mm) or less, proceed to step 6.  
ECCENTRIC NUT MODELS  
5. See Figure 8. Loosen the outside nut (A). Turn the  
eccentric nut (B) to raise or lower left-hand side of  
mower. When mower is level, hold the eccentric nut  
while tightening the outside nut.  
NOTE: 44”, 50”, & 54” Mowers. When using a turbo col-  
lection system, raise the discharge side of the mower  
approximately 1/4” (6mm) to compensate for turbo  
assembly weight. Check the level of the cut grass and  
adjust the 1/4” (6mm) measurement as necessary for a  
smooth, even cut.  
FRONT-TO-BACK LEVELING  
NOTE: 54” mowers have two adjustment rods that  
should be adjusted simultaneously.  
A
B
6. Arrange the blades so they face front-to-back.  
7. Measure the distance from the ground to the front tip  
of the center blade, and from the ground to rear tips  
of left-hand and right-hand blades.  
Front tip of the center blade should be 1/4" (6mm)  
higher than rear tips of left-hand and right-hand  
blades. If not, proceed with steps 8 - 9.  
Figure 10. Front to Back Leveling  
A. Rear Nut  
B. Front Nut  
8. To raise front of mower deck, loosen front nut (B) and  
turn rear nut (A, Figure 10) against bracket. To lower  
front of mower deck, loosen rear nut (A) and the  
bracket will move backwards to lengthen rod.  
9. Re-check the blade measurement then tighten the  
front nut (B) against the bracket to secure.  
Form No. 1727716  
Revision:02  
TP 200-4144-02-SK-SMAN  
MANUFACTURING, INC.  
Briggs & Stratton Yard Power Products Group  
Copyright © 2007 Briggs & Stratton Corporation  
Milwaukee, WI USA. All Rights Reserved  
500 N Spring Street / PO Box 997  
Port Washington, WI 53074-0997 USA  
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