RJL 100 April 2009
WARNING: If incorrectly used this machine can cause severe
injury. Those who use and maintain this machine should be
trained in its proper use, warned of its dangers and should
read the entire manual before attempting to set up, operate,
adjust or service the machine.
Fitting Instructions
G-Plex III - Backlap Kit LMAC069
24596G (rev.2)
Series : DN - Engine type: Briggs & Stratton 350447
Product code: USAG001
Series : FJ - Engine type: Briggs & Stratton 350447
Product code: USAG002
© 2009, Ransomes Jacobsen Limited. All Rights Reserved
1
G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
NOTICE
NOTICE
INSTALLATION INSTRUCTIONS
IMPORTANT!
Read all instructions thoroughly before beginning installation. When you complete the installation,
put this instruction with operator’s manual in the bag on the vehicle. These instructions alert you to
certain things you should do very carefully, if you don’t, you could: hurt yourself or bystanders, hurt
the next person who operates the equipment, or damage the accessory or the vehicle it is used on.
This “HAZARD” symbol is used to alert you to information about unsafe actions or situations,
and will be followed by the word DANGER, WARNING, or CAUTION. Used with the word DANGER it will
describe immediate hazards that may result in severe personal injury or death. With the word WARNING it will
describe unsafe actions or situations that may cause severe injury, death and/or major equipment or property
damage. With the word CAUTION it will describe unsafe actions or situations that may cause injury, and/or
minor equipment or property damage.
This NOTICE symbol is used to alert you to information that describes procedures or tips
that will help you install, operate and maintain you equipment.
FITTING INSTRUCTIONS, PART NO. LMAC069
FOR G-PLEX III - (DN Series Only)
Backlap Kit
· Before beginning, read through this instruction manual and familiarise yourself with all the parts in the
Backlap Kit and the steps for proper installation.
· The left or right side or the machine will always be determined from the operator’s seated position.
· Place the cutting units in the lowered position and make sure the ignition key is removed from
the ignition switch. Then disconnect Battery Negative Lead and place in safe position.
Ensure Battery Negative Lead is
disconnected.
CAUTION
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G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
Fig 1
Fig 2
Fig 3
Fitting Instructions
1. Locate Backlap Valve from Kit and
Assemble Hydraulic Fittings(3 off elbow
4192320 & 1 off Tee4199983 ) and
Handle (4197680) as per photo. (Fig.1).
4. Remove indicated Hydraulic parts
(4124173, 002540080, 4124349, 4124172).
Note Hydraulic Pipe 894245, requires
disconnecting and assembling so the
opposite ends are connected. (Fig. 3)
2. Disconnect Battery earth strap.
3. Lift up Seat plate to expose current
hydraulic piping. (Fig.2)
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G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
Fig 4
Fig 5
Fitting Instructions
5. Fasten assembled Backlap Valve to
Machine,place the spacer pad ( 4197621)
under the valve before secure to the plate
using using M6 x 35 Screws (450002) and
M6 Nyloc Nuts (450377) 2 per Valve. Fit
new pipe 894248, Connect up pipes and
tighten fittings. (Fig.4)
6. Assemble Microswitch (4142765) onto
switch bracket (4146471), using nut
(4142766) so that the switch is in line with
the valve.
Note use the holes that are closer to the
valve and in the higher position (Fig. 6)
Then fasten this sub-assembly to
Machine, using screw (456110016),
washer (452100019), lockwasher
(452200029) & nut (450120013).
7. Remove cable tie securing the splice for the
backlap switch on the main wiring harness.
Connect backlap switch (4142765) to
backlap switch upgrade link (4154620) then
this connects to the splice.
Ensure wiring once connected, will not get
pinched/trapped.
Reconnect Battery earth strap and test.
Holes new valve
& switch pos’
Fig 6
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G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
A
N
B
3
2
1
1. Restriction Valve
2. Backlap Valve
3. Reel Control Lever
A. Mow Position
B. Backlap Position
N. Neutral Position
ALWAYS open the restriction valve
before setting the reel control lever to
BACKLAP position. DO NOT set the reel
control lever to the BACKLAP position
before opening the needle valve in the
bypass circuit. This will cause the reels
to start turning IMMEDIATELY at full
speed.
Keep hands, feet and clothing away from
all three reels whenever the reel control
lever is placed in the backlap position.
When backlap restriction valve is closed
or being closed, all three reels will rotate
in the backlap direction.
WARNING
BACKLAPPING
When fitted with this device it allows the reels to be
driven in reverse for backlapping.
• Backlapping is a process which will lightly
grind the reel to the bedknife whilst
mounted on the mower.
• If significant amounts of metal are to be
removed then the cutting unit should be
reground on a specialised grinding
machine.
• Before any backlapping is carried out,
Ransomes Jacobsen recommends that the
backlapping process should be risk
assessed as a workshop process by the
manager of the machine.
• Backlapping should only be carried out by
trained staff.
• Ransomes Jacobsen recommend that
grinding paste is only applied to the reel
when it is stationery, the engine is off and
the parking brake applied.
• When applying grinding paste the reel
should only be rotated by appropriately
sized piece of wood and not by hand.
• Place reels in the most accessible
position for applying the paste.
• Leave the grass boxes in position on the
cutting units as a safety barrier.
• After applying the grinding paste the
backlapper should return to the seat,
engage the relevant controls and run the
reels in reverse.
• When the desired finish is achieved switch
off the mower, clean off any surplus paste,
reset the reel to bedknife and return the
controls to the normal mow positions.
Ransomes Jacobsen grinding paste:
80 grit grinding paste, 4.5kg tin,
Part number 5002488
120 grit grinding paste, 4.5kg tin,
Part number 5002489
80 grit grinding paste, 9kg tin,
Part number 5002490
120 grit grinding paste, 9kg tin,
Part number 5002491
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G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
6
G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
Backlap Kit
14
15
12
8
9
10,11
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G-PLEX III BACKLAP KIT
INSTALLATION INSTRUCTIONS LMAC069
* Not Illustrated
LIST OF PARTS
ITEM RANSOMES DESCRIPTION QTY REMARKS
PART NO
1 2208047 Valve,4-Way, 3 Position 1
2 843411 Lever 1
3 844071 Tee, Branch 1” ORFS -14 1
4 W158007-03 90-M/M 13/16” ORS x 7/8 SAE 1
5 W158007-02 90-M/M 13/16” ORS x 3/4” SAE 2
6 450008 Bolt-Hex M6 X 65 3
7 450377 Nut-Hex M6 Nyloc 3
8 4146471 Bracket, Switch Mtg 1
9 456110016 Screw-Hex 1/4”-20 x 3/4” 2
10 452100019 Washer - 1/4” x 5/8” x .064” 2
11 452200029 Lockwasher 1/4” x .425 x .072 2
12 450120013 Nut-Hex 1/4” -20 2
13 894248 Line Ay, Hydraulic 1
14 4142765 N/O Switch (Delta) 1
15 4142766 Nut for Switch 1
* 4154620 Backlap Switch Upgrade Link 1
From Jan 2009
1 4192304 Valve,4-Way, 3 Position 1
2 4197680 Lever 1
3 4199983 Tee, Branch 1” x 1/2” x 1” 1
* 4197621 Spacer Pad 1 To be placed under valve
4 4192320 90-M/M 13/16” ORS x 1/2” BSP 3
6 450008 Bolt-Hex M6 X 65 3
7 450377 Nut-Hex M6 Nyloc 3
8 4146471 Bracket, Switch Mtg 1
9 456110016 Screw-Hex 1/4”-20 x 3/4” 2
10 452100019 Washer - 1/4” x 5/8” x .064” 2
11 452200029 Lockwasher 1/4” x .425 x .072 2
12 450120013 Nut-Hex 1/4” -20 2
13 894248 Line Ay, Hydraulic 1
14 4142765 N/O Switch (Delta) 1
15 4142766 Nut for Switch 1
* 4154620 Backlap Switch Upgrade Link 1
A 894244 Line, Hydraulic 1 Not Supplied in Kit
B 894245 Line, Hydraulic 1 Not Supplied in Kit
C 002540080 Tee, Branch 1 Not Supplied in Kit
D 4124173 Tube 1 Not Supplied in Kit
E 4124349 Adaptor Elbow, 90 2 Not Supplied in Kit
Backlap Kit
Ransomes Jacobsen Limited
West Road, Ransomes Europark, Ipswich, IP3 9TT
English Company Registration No. 1070731
www.ransomesjacobsen.com
Jacobsen, A Textron Company
11108 Quality Drive, Charlotte,
NC 28273, USA
www.Jacobsen.com
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