Rotary Speed-Feed Universal 375 LH Instrucciones De Instalación

Speed-Feed
®
Universal 375 LH Trimmer Heads
P/N 78890-18001
Installation and Loading Instructions
Package Contents:
1 Speed-Feed 375 LH Universal Mount Trimmer Head
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Bushings
(F) 1 - 8mm x 1.25mm LH Bushing (Red)
(G) 1 - 10mm x 1.0mm LH Bushing (Green)
(E) 1 - 10mm x 1.25mm LH Bushing (Gold)
(J) 1 - 10mm x 1.25 LH Long Bushing (Silver)
(M) 1 - Reversible Nylon Spacer w/20/25/38 mm Recesses
Mounting Studs
(H) 1 – 7mm x 10mm Mounting Stud (Gold)
(I) 1 – 8mm x 10mm Mounting Stud (Silver)
Trimmer Head Installation
1. Insert locking tool (A) into gear case to lock output shaft (B). Remove existing cutting attachment (C) from unit
following manufacturer's instructions.
IMPORTANT: Your unit must be equipped with a debris shield including a line cutter that will cut line to length
when trimmer line is advanced.
2. Install or reuse unit manufacturer's gear case base plate (D). Base plate must support trimmer head and allow it
to rotate freely.
3. Select and Install Speed-Feed
Use the Speed-Feed Application Chart provided to identify the bushing or bushing and mounting stud
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combination needed for your model.
IMPORTANT: For Echo units only. Check debris shield on unit for "R" mark between cutoff blade screws.
a. Units with "R" mark – Speed-Feed
b. Units without "R" mark – Remove short bushing from Speed-Feed
bushing (J) and use spacer (M).
NOTE: If your brand or model number is not listed, match the existing mounting hardware from your model
with Speed-Feed mounting studs and/or bushings to determine the correct parts needed. If you need help,
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visit www.speedfeedhead.com, or call the Consumer Product Support Department at 1-800-432-3246 from
8:30 am to 4:30 pm (Central Time) Monday through Friday.
NOTE: Bushing (E) (used with LH1, LH2, LH6) is preinstalled in trimmer head. Bushing (F) (used with LH3,
LH4), bushing (G) (used with LH5), and (J) (used with LH6) are included in the package. If required, depress
locking tabs (T), and open trimmer head (K) to install new bushing. Reassemble trimmer head in reverse
order of disassembly. Make sure "L" mark is facing up when replacing spool. Trimmer head halves will snap
together tightly only if parts are properly assembled.
4. If required, install new mounting stud (H) (7mm x 10mm) or (I) (8mm x 10mm) into threaded hole in gear case
output shaft (B). Turn "LH" studs counterclockwise to tighten.
5. If required, place reversible spacer (M) on base plate of gearcase, matching spacer recess to pilot diameter of
base plate.
NOTE: When spacer is properly matched and installed, there should be no gap between spacer and base
plate on gearcase.
6. Attach New Trimmer Head (K)
Thread trimmer head counterclockwise on to mounting stud or output shaft. Hand-tighten only.
NOTE: There should be no gap between spacer and line head after tightening.
IMPORTANT: Do not force, otherwise threads will strip and cause permanent damage. Unscrew and confirm
correct thread size.
7. Remove locking tool (A) from gear case.
8. If necessary, cut trimmer lines so length does not extend beyond the cut-off blade on debris shield.
9. To feed trimmer line, bump bottom of trimmer head against ground while running at normal operating speed.
X7672050702
06/11
Mounting Hardware
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line head will fit on unit as is - go to Step 6.
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line head and replace with long
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B
C
D
A
I
F
H
G
J E
M
T
E, F, G, or J
T
M
B
H,I
D
A
K
L
A