Manitowoc National Crane 1300A Service And Maintenance Manual

National Crane 01-22-2019 Control # 051-08 3-9
1300A ELECTRIC SYSTEM
3
HYDRAULIC OIL COOLER
The hydraulic oil cooler (Figure 3-8) is mounted on the driver
side of the hydraulic reservoir. An electric fan in the cooler
housing circulates air over the cooling core when the
hydraulic oil reaches 140° F (60° C).
Not all return flow is routed through the oil cooler. A 30 psi
(206 kPa) check valve limits the flow through the cooler.
Since hydraulic oil is thicker when it is cold, less oil is routed
through the cooler when it is cold than when it is hot.
The cooler electrical system is made up of the following:
• Electric Fan
• Fan Relay
• Temperature Senor
The temperature sensor is located in the cooling core and
energizes the fan relay when the hydraulic oil reaches
140° F (60° C). The fan relay is located on the driver side of
the cooler housing and turns the fan on when energized
(Figure 3-8). If the fan does not run when the hydraulic oil is
hot check the temperature sensor, relay, and fan motor.
NOTE: The fan runs constantly if the sensor fails.
HYDRAULIC TEMPERATURE WARNING
LIGHT
A warning light on the crane cab console is illuminated when
the hydraulic oil has exceeded the maximum recommended
temperature. A sensor in hydraulic swivel port #1 monitors
the temperature and turns the light on when the hydraulic oil
reaches 190° F (87.7° C). If the light fails to illuminate, check
the light and the temperature sensor in swivel port #1.
Item Solenoid
1 Driver Side Stabilizer
2 Driver Side Beam
3 Passenger Side Beam
4 Passenger Side Stabilizer
1
2
3
4
FIGURE 3-7
FIGURE 3-8
Cooling Core
Fan Relay
Access
Panel

Manitowoc National Crane 1300A Specifications

General

Brand	Manitowoc
Model	National Crane 1300A
Category	Construction Equipment
Language	English