{TAIL ~ Wheels} are fitted to {HEAD ~ an outer end} of the piston rod of the cylinder to prop up the propped block 
{ TAIL ~ Wheels } are fitted to { HEAD ~ an outer end } of the piston rod of the cylinder to prop up the propped block
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH