missing parts

[crapper]

hello all.looking for any info on tensioner body esn cap.
i took the cap off to see if plunger was out of travel and all that came out with the cap was 1 spring(tighter wound one) and an end cap type thing that the spring sat in.
in gadgets instructions, his picture of the cap taken off shows an outer spring also and looks like other stuff inside cap....
he also said to take cap off easy because of spring loaded parts could fly out. the only spring loaded stuff in my cap was a spring
am i missing some parts or what.........
any insight would be greatly appreciated