Dynojet 248: Maintenance Guide - Manual (Page 7)

A U T O D Y N O M A I N T E N A N C E
Model 224 Dynos with Air Over HyDraulic (AOH) Brake Systems
Version 3 Maintenance Guide for Automotive Dynamometers
3
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MODEL 224 DYNOS WITH AIR OVER HYDRAULIC (AOH) BRAKE SYSTEMS
This section covers maintenance items for model 224 dynos with a single drum and
AOH braking.
Figure 1: Model 224 with Air Over Hydraulic (AOH) Brakes
T HINGS TO C HECK
• Check all air fittings for leaks monthly. Correct any leaks found.
• Once per month verify that the drum brake pressure gauge reads 55 to 65psi
(380 - 450kPa). Adjust the regulator if the pressure is out of specification.
• Once per month check the drum brake shoe clearance. Refer to page 4 for more
information.
• Dyno Bearing Grease:
Under steady use, over 25 runs per day, each bearing should receive .65oz (19 ml)
of a recommended grease every 2 months.
Under occasional use, less than 25 runs per day, each bearing should receive
.65oz (19 ml) of a recommended grease every six months.
Recommended Grease:
grease specification description
thickener Lithium 12 Hydroxy Stearate
oil Petroleum
thickness NLGI 2
operating temperature
(Fahrenheit)
-20°F to 200°F, intermittent to 250°F
operating temperature
(Celsius)
-29°C to 93°C, intermittent to 121°C
EP additive yes
examples Mobil Mobilith AW-2
AD203