REPLACEMENT STRING TRIMMER HEAD
This Replacement String Trimmer Head is exclusively compatible with
EGO POWER+ String Trimmer ST1500F and ST1500SF.
DANGER:
If the head loosens after it is fixed in position, replace it immediately. Never use a trimmer with
a loose cutting attachment. Replace a cracked, damaged or worn out cutting head immediately, even if
damage is limited to superficial cracks. Such attachments may shatter at high speed and cause serious
injury.
WARNING:
Always remove the battery pack from the product when you are assembling parts,
making adjustments, cleaning, or when the product is not in use.
1
Flange
Spool Base
Spring
Spool Retainer Assembly
Remove the trimmer head
2
3
Spool Retainer
Release tab
1. Press the 2 release tabs on the spool retainer to remove it (Fig. 2 & 3).
2. Pull the spring out of the spool base (Fig. 4).
5
4
Spring
3. Wear gloves to hold the spool base with one hand and, with the other hand, use an impact socket
wrench (9/16", 14mm) to loosen and remove the nut (Fig. 5).
4. Remove the plain washer from the motor shaft and save it for reassembly (Fig. 6).
5. Hold the spool base and pull it straight out from the motor shaft (Fig. 7).
6
OPERATING MANUAL
MODEL NUMBER AH1500
6. Remove the flange from the spool base and save it to secure the new spool base (Fig. 8).
Install the new trimmer head
1. Position the flange removed in step 6 of the "remove the trimmer head" section onto the motor shaft
with the flat surface facing away from the base (Fig. 9).
8
Plain Washer
Nut
Cutting Line
2. Align the mounting hole in the spool base with the motor shaft and mount the base onto the shaft.
(Fig. 10)
3. Position the plain washer onto the motor shaft (Fig. 6).
4. Mount the nut onto the shaft and turn it clockwise by hand to pre‑tighten it (Fig. 11).
10
Spool Base
5. Wear gloves to hold the spool base with one hand, and, with the other hand, use a socket wrench
(9/16", 14mm) to tighten the nut onto the shaft.
6. Fit the spring into the spool base and make sure it is pressed into position (Fig. 4).
7. With one hand holding the spool base, use the other hand to grasp the spool retainer and align the
tabs on the spool retainer with the holes in the spool base. Use your palm to press and rotate the
spool retainer left and right until the tabs lock with the spool base. (Fig. 12 & 13).
12
Nut
7
Motor Shaft
Plain
Washer
Motor shaft
9
Spool Base
Flange
11
Spool Base
13
Alignment
8. If any parts of the spool retainer assembly
are damaged or worn, replace the damaged
part and reassemble them shown in Fig. 14.
Wind the spool with new line
NOTICE:
Always use the recommended nylon
cutting line with a diameter that does not exceed
0.095 in. (2.4 mm). Using line other than that
specified may cause the string trimmer to overheat
or become damaged.
WARNING:
Never use metal‑reinforced line,
Spool Base
wire, or rope, etc. These can break off and become
dangerous projectiles.
WARNING:
To prevent serious personal injury, remove the battery pack from the tool before
servicing, cleaning, changing attachments or removing material from the unit.
1. Remove the battery pack.
2. Rotate the spool retainer in direction indicated by the arrow as necessary to align the LOAD line on
the spool retainer with the eyelets in the spool base (Fig. 15).
3. Cut one piece of cutting line 16 ft. (5m) long. Insert the line into the mounting hole, which is located
Flat surface facing
inside the eyelet. Push until the end of the line comes out of the other side of the spool base. Pull
away from the base
the line from the other side until equal amounts of line appear on both sides of the spool (Fig. 16).
15
Eyelet
4. Rotate the spool retainer in the direction of
the arrow to wind the line onto the spool
until approximately 5.5 in. (14cm) of line is
showing on each side (Fig. 17).
5. Push the spool retainer down while pulling
Nut
on lines to manually advance the line and to
check for proper assembly of the trimmer
head.
14
Spool Retainer Assembly
Screws
Slot Covert
Wire Holder
Location Housing
Head Housing
16
Arrow Direction
Mounting Hole
LOAD Line
inside the Eyelet
17
5.5" (14 cm)