Echo CH9540H Instruction v.1

Instructions

PRODUCT: ELECTRONIC FEED
KIT (PN 74898-00)

FITS MODEL: CH9540H (72854)

SERIAL NUMBER 803703 & BELOW

WARNING

BEFORE INSPECTING OR SERVICING ANY PART
OF THIS MACHINE, SHUT OFF POWER SOURCE,
DISCONNECT SPARK PLUG WIRE FROM SPARK
PLUG AND MAKE SURE ALL MOVING PARTS HAVE
COME TO A COMPLETE STOP.

MOUNTING THE LOFA CONTROL

TOP COVER

FOUR 1/4" HOLES

Figure 1

Remove the drive shaft joint shield ring.1.

Remove upper belt guard.2.

Remove the top cover from the Feed Roller Support 3.
unit. If the serial number is equal to or greater than
X01249, skip to STEP 7 (Figure 1).

Remove the back cover from the LOFA control, center it 4.
3-1/2” from the top on the front plate of the Feed Roller
Support housing and mark the position of the holes.

Drill four 1/4” holes (Figure 1).5.

Attach the ISO-Mounts to the controller back plate with 6.
the bolts and nuts provided (Figure 2).

Secure the back plate of the controller to the Feed 7.
Roller Support housing with a washer and one M4-

0.7 nut per bolt. Apply thread locking adhesive and
tighten.

Replace the Feed Roller Support cover.8.

Attach the LOFA Control to the back plate (Figure 2)9. .

Instruction Sheet

Figure 2

PN 74916-00

Rev. 010508

INSTALLING THE SOLENOID

SENSOR

BOLT, 1/2 X 2 HEX

SENSOR BRACKET

NUT, 1/2 CENTERLOCK

1/8" - 1/16"
GAP

CARTRIDGE VALVE

Remove outer plug (using 5/16" allen wrench) from the 1.
top of the valve manifold.

Once the outer plug has been removed, using a 3/16 2.
allen wrench, extract the inner plug located in the relief
valve (Figure 3).

Figure 5

INSTALLING THE SENSOR

Figure 3, 3/16" inner plug

Replace the removed components with the new sole-3.
noid cartridge valve and coil.

Connect solenoid wiring to LOFA Control wiring har-4.
ness (Figure 4).

Figure 3

Secure the sensor bracket with the lower left bearing 1.
bolt and position it (the sensor) so it aligns with the set
bolt (Figure 5).

POSITIONING THE SENSOR

Position the sensor approximately 1/16” - 1/8” from the 1.
head of the bolt (Figure 6).

Replace the belt guard weldment using 5/16” hard-2.
ware.

Figure 6

ELECTRICAL INSTALLATION

Attach the chipper to the tractor. Connect the RED 1.
positive lead to a +12 Volt DC power source on the
tractor.

Connect the BLACK negative lead to a grounding 2.
source on the tractor.

Drill a 3/16" hole in the PTO stand, close to the 3.
solenoid valve, and secure the ground wire with the #10
self-tapping screw provided.

Connect the two-pin connector to the top of the valve 4.
coil.

Connect the socket connector to the LOFA control.5.

Secure the wiring harness with cable ties as appropriate.6.

Instruction Sheet