Figure 2-41. Main Clutch and Control Valve.
f. Watch Concrete Production. Be prepared to stop the mixer if trouble occurs. Troubleshooting procedures are
During operation, the extension clutches and mixing trough may be swung from side to side as
required for concrete delivery. Instructions for adjusting the mixing trough are given in paragraph
g. Slump Check
(1) Slump Measurements.
(a) Slump is a measure of how wet or dry concrete is. The concrete mix design specifies the desired
slump. The mix settings chart (fig. 2-11) shows two water settings, one for dry sand and one for
normal sand. The correct water setting needed will be somewhere between the two. Adjust the water
setting until the slump matches the mix design specification. If you cannot get the correct slump with
a setting somewhere between the DRY and NORMAL settings.