JLG 660SJ Service Manual - Manual (Page 191)

SECTION 5 - HYDRAULICS
3121298 – JLG Lift – 5-1
SECTION 5. HYDRAULICS
5.1 O-RING LUBRICATION
When assembling connectors, all fittings with O-rings must be
lubricated with hydraulic oil before assembly. There are four
methods of lubricating O-rings:
1. Cup and Brush
2. Dip
3. Spray
4. Brush-On
Cup and Brush
Tools needed:
• Small container for hydraulic oil
• Small paint brush
1. Hold fitting in one hand and dip brush into container
with other hand. Remove excess hydraulic oil from
brush so an even film of oil is applied to O-ring.
2. Hold fitting over hydraulic oil container and brush an
even film of oil around entire O-ring in fitting. Make sure
O-ring is completely saturated.
3. Turn fitting over and repeat previous step to O-ring on
other side of fitting. Make sure entire O-ring is coated
with hydraulic oil.