Gradall 534C-10 (2460-4129) Service Manual - Manual (Page 55)

Reason for Engine Speed Check
Low engine RPM can reduce control pressure. Control pressure determines machine speed. This condition can slow
machine speed at full RPM.
Check engine speed with an adequate tachometer. At low idle, it should be 800-900 RPM. Adjust engine speed
using the screw on the injection pump. At full throttle with no load, it should be 2500-2700 RPM. When testing
engine speed, make sure the injection pump lever is contacting the stop. The sealed adjustment screw on the pump
is not adjustable. Please note the initial adjustment on current accelerator pedals.
See Figure 4, Figure 5, Figure
6 and Figure 7
FIGURE 4
ENGINE ASSEMBLY (LEFT SIDE)
III. Engine Speed
Form No. 29633 3/97 534C-9 & 534C-10
HYDROSTATIC DRIVE PERFORMANCE CHECKS MANUAL
3