Operation; Nylon Cutting Head - Dolmar AT-1831 C Instruction Manual

Nylon cutting head

NOTICE:
• Do not attempt to bump feed the head while the tool is
operating at a high RPM. Bump feeding at a high RPM
may cause damage to the nylon cutting head.
• The bump feed will not operate properly if the head is
not rotating. (Fig. 12)
The nylon cutting head is a dual grass trimmer head
provided with a bump & feed mechanism.
To cause the nylon cord to feed out, the cutting head
should be bumped against the ground while rotating at a
low RPM.
NOTE:
If the nylon cord does not feed out while bumping the
head, rewind/replace the nylon cord by following the
procedures described under "Maintenance".
ASSEMBLY
WARNING:
• Always be sure that the tool is switched off and
battery cartridge is removed before carrying out
any work on the tool. Failure to switch off and remove
the battery cartridge may result in serious personal
injury from accidental start-up.
• Never start the tool unless it is completely
assembled. Operation of the tool in a partially
assembled state may result in serious personal injury
from accidental start-up.
Mounting the attachment pipe
Only for model AT-1831 CD (Fig. 13)
To mount the attachment to a power unit:
1. Make sure that the lever is not tightened.
2. To open the entrance of the joint, depress the joint
cover. (Fig. 14)
3. Align the protrusion on the pipe (cutting tool side ) with
the concave portion of the joint part.
4. Insert the attachment pipe into the joint part. Make
sure that the surface of the lock lever is horizontal to
the pipe.
5. Tighten the lever firmly as shown.
To remove the attachment, loosen the lever, press the
front part of the lock lever and then slide the pipe.
Installing the grip (Fig. 15)
Fit the grip onto the shaft pipe and tighten it with two hex
bolts. Make sure that the spacer on the shaft pipe is
located between the grip assembly and the other grip. Do
not remove or shrink the spacer.
CAUTION:
• For model AT-1831 CD, never install the grip on the
joint.
Installing the guard
WARNING:
• Never use the tool without the guard illustrated in
place. Failure to do so can cause serious personal
injury. (Fig. 16 & 17)
Align the protrusions on the protector with the grooves of
the motor housing. (Fig. 18)
Align the protrusions on the protector holder with the
concave portions of the motor housing. Insert the
protector holder to the motor housing. (Fig. 19)
After attaching the protector and the protector holder to
the motor housing, tighten the hex bolts securely.
Installing the wire guard
CAUTION:
• Before adjusting the wire guard, wait for the cutting
head comes to standstill. Do not adjust the wire guard
with your foot. (Fig. 20)
To reduce the risk damaging the objects in front of the
cutting head, insert the wire guard so that it controls the
cutting range of the mowing line. (Fig. 21)
Slightly expand the wire guard outward and then insert it
into the holes of the protector.
NOTE:
• Do not expand the wire guard outward too much.
Otherwise it may break. (Fig. 22)
When wire guard is not in use, lift it for the idle position.
Installing nylon cutting head
NOTICE:
• Be sure to use genuine Dolmar nylon cutting head.
Turn the tool upside down so that you can replace the
nylon cutting head easily. (Fig. 23)
Insert the hex wrench through the hole on the protector
cover and the motor housing and rotate the receive
washer until it is locked with the hex wrench. Mount the
metal guard, the nylon cutting head onto the threaded
spindle directly and tighten it by turning it
counterclockwise. Remove the hex wrench.
To remove the nylon cutting head, turn the nylon cutting
head clockwise while holding the receive washer with the
hex wrench.
CAUTION:
• If during operation the nylon cutting head
accidentally impacts a rock or hard object the
trimmer should be stopped and inspected for any
damage. If the nylon cutting head is damaged it
should be replaced immediately. Use of a damaged
nylon cutting head could result in serious personal
injury.

OPERATION

Correct handling of tool
Attachment of shoulder harness (Fig. 24)
Put the shoulder harness on. Then connect the buckles
on both the hook and the harness. Be sure that the
buckles click and lock completely in place.
Only for model AT-1831 CD (Fig. 25)
When the cap is not in use, hang it on the hook.
Detachment (Fig. 26)
The buckle is provided with a means of quick release.
Simply squeeze the sides and the buckle to release the
tool.
WARNING:
• Be extremely careful to maintain control of the tool
at all times. Do not allow the tool to be deflected
13