INTRODUCTION 1 - 5
GEM Service Manual November 2007
PARTS AND LUBRICANT
RECOMMENDATION
When service is required, GEM recommends that
only GEM replacement parts be used. GEM
provides the best-engineered products for servicing
GEM vehicles.
DESCRIPTION - LUBRICANTS AND GREASE
Only lubricants bearing designations defined by
The Society for Automotive Engineers (SAE)
should be used to service a GEM vehicle.
The National Lubricating Grease Institute (NLGI)
rates lubricating grease for quality and usage. All
approved products have the NLGI symbol (Fig. 3)
on the label. At the bottom of the symbol is the
usage and quality identification letters. The letter
"G" identifies wheel-bearing lubricant. The letter "L"
identifies chassis lubricant. The letter following the
usage letter indicates the quality of the lubricant.
The following symbols indicate the highest quality.
Fig. 3 NLGI Symbols
1 - Wheel bearing lubrication
2 - Chassis lubrication
3 - Chassis and wheel bearing lubrication
DESCRIPTION - DIFFERENTIAL
Use 30 SAE engine oil – 12.44:1/14.76:1, 16 oz..
DESCRIPTION - BRAKE FLUID
Use only DOT 3 brake fluid from an unopened
container when filling the master cylinder to prevent
contaminants from entering the brake system.
MAINTENANCE SCHEDULES
Perform the following inspections, and corrections
as necessary, on a monthly basis.
Item Description
1. Check all six batteries for proper water
levels (if applicable).
2. Check battery terminals for tight
connections.
3. Check battery terminals for corrosion.
4. Check tires for correct PSI and wear.
5. Check for proper operation of hand brake.
6. Check master cylinder for proper brake
fluid levels.
7. Check brake lines for leaks.
8. Check seat belts for proper operation.
9. Check headlights, horn, turn signals,
windshield wiper and brake lights for
proper operation.
10. Check battery hold-down bar to make
sure batteries are tightly secured.
11. Check for worn insulation and frayed
wires.
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