JLG 80SL Service Manual - Manual (Page 34)

SECTION 2 - GENERAL
2-10 – JLG Lift – 3121325
2.5 CYLINDER DRIFT TEST
Maximum acceptable cylinder drift is to be measured
using the following method.
Platform Drift
NOTE: Test cylinder drift with machine oil at ambient tem-
perature.
1. Place maximum work load onto platform (Refer to
Table 1-1, Operating Specifications).
2. Extend lift cylinder to achieve a platform height 3 to
5 meters from fully stowed.
3. Wipe cylinder rod clean and place a mark on the rod
50mm from the cylinder head.
4. Wait 15 minutes.
5. Measure distance of mark from head.
6. Difference (cylinder drift) must not exceed 3mm.
NOTE: If cylinder drift exceeds 3mm, repeat test. If still
greater than 3mm, check holding valve (refer to Fig-
ure 4-44., Lift/Lower Valve Block). If still greater than
3mm, replace cylinder seals (refer to Section 4.4,
Cylinder Repair).
2.6 PREVENTIVE MAINTENANCE AND
INSPECTION SCHEDULE
The preventive maintenance and inspection checks are
listed and defined in the following table. This table is
divided into two basic parts, the “AREA” to be inspected
and the “INTERVAL” at which the inspection is to take
place. Under the “AREA” portion of the table, the various
systems along with the components that make up that
system are listed. The “INTERVAL” portion of the table is
divided into five columns representing the various inspec-
tion time periods. The numbers listed within the interval
column represent the applicable inspection code for
which that component is to be checked.
The checks and services listed in this schedule are not
intended to replace any local or regional regulations that
may pertain to this type of equipment nor should the lists
be considered as all inclusive. Variances in interval times
may occur due to climate and/or conditions and depend-
ing on the location and use of the machine.
JLG INDUSTRIES REQUIRES THAT A COMPLETE ANNUAL
INSPECTION BE PERFORMED IN ACCORDANCE WITH THE
"ANNUAL MACHINE INSPECTION REPORT" FORM.
Forms are supplied with each new machine and are also
available from JLG Customer Service. Forms must be
completed and returned to JLG Industries.
NOTE: This machine requires periodic safety and mainte-
nance inspections by a JLG Dealer. A decal located
on the frame affords a place to record (stamp)
inspection dates. Notify dealer if inspection is over-
due.
The inspection and maintenance code numbers are as fol-
lows:
1. Check for proper and secure installation.
2. Check for visible damage and legibility.
3. Check for proper fluid level.
4. Check for any structural damage; cracked or broken
welds; bent or warped surfaces.
5. Check for leakage.
6. Check for presence of excessive dirt or foreign
material.
7. Check for proper operation and freedom of move-
ment.
8. Check for excessive wear or damage.
9. Check for proper tightness and adjustment.
10. Drain, clean and refill.
11. Check for proper operation while pump/motor is
running.
12. Check for proper lubrication.
13. Check for evidence of scratches, nicks or rust and
for straightness of rod.
14. Check for condition of element; replace as neces-
sary.
15. Check for proper inflation