Mec Speed Level 2684 ES, Руководство по обслуживанию и запасным частям

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“3084 Speed Level™ Sigma Lift” Service and Parts Manual November 2009
Page 4b-3
T
R O U B L E S H O O T I N G
- 3 0 8 4 E S
M O D E L
- - G
E N E R A L
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R O U B L E S H O O T I N G
T
I P S
G
ENERAL
T
ROUBLESHOOTING
T
IPS
H
YDRAULIC
F
LUID
P
UMP
: 3084ES M
ODELS
The 3084ES Aerial Work Platforms operate on a “Motor Control” theory in which fluid
flow volume is controlled by varying the speed of the DC electric motor driving a fixed
displacement pump. 100% of the fluid produced by the pump goes to the selected
function.
B
ATTERY
C
HARGE
S
TATE
: 3084ES M
ODELS
Before you begin troubleshooting this model, check the battery state of charge and
inspect the battery connections for looseness or corrosion. A fully charged battery pack
on a 48 Volts DC system will have a nominal voltage of 52.5–54 Volts DC.
Common Causes of Electrical System Malfunctions:
• Battery switch is turned OFF (located to the left of lower controls).
• Battery connections are loose or corroded
• Battery is not fully charged.
• Emergency Stop buttons are pushed (OFF position).
• Circuit breaker is in the tripped (OFF position).
Common Causes of Hydraulic System Malfunctions:
• Hydraulic fluid level is too low.
• Incompatible hydraulic fluids mixed, destroying the additives and causing varnish build up,
resulting in the valves sticking.
• Water in the hydraulic fluid due to a damp climate.
• Improper hydraulic fluid used. Viscosity too high in cold climates. Viscosity too low in warm
climates.
• Hydraulic fluid contaminated with debris - filter change interval neglected.
NOTE: MEC uses a multiple viscosity fluid that is light enough for cold climates and resists thinning in warm
climates. Use only the recommended hydraulic fluid. Substituting with a lower grade fluid will result in pump
failure. Refer to “Lubrication” in the
INTRODUCTION Section
NOTE: Contamination always causes failure in any hydraulic system. It is very important to be careful not to
introduce any contamination into hydraulic system during the assembly procedures. Please make sure all ports
and cavities of the manifold and cylinders are properly covered/plugged during maintenance activities.