500E2 OPERATOR MANUAL SET-UP
National Crane Published 07-26-2019 Control # 111-06 4-11
attaching loadline wedge socket to attachment point F
on the jib sheave case. Slowly activate the hoist up
function until the 2
nd
sections fully retracted
3. Reinstall extension retention pin through the 1
st
and 2
nd
section jib assembly and install spring clip.
4. Remove loadline from jib sheave case. Place loadline in
area to avoid possible damage from stow procedure.
5. Disconnect twist lock anti-two-block wire connector at
rear of 1
st
section jib. Connect twist lock connector to
anti-two-block switch connector on boom tip. Move anti-
two-block weight assembly to boom tip switch.
6. Attach tag line to sheave case end of jib.
7. Remove spring clips from pins C2 on both upper and
lower jib ears.
8. Remove pins C2 from upper and lower jib ears. Do not
remove C1 pins at this time. C1 pins will be used as a
pivot point to swing jib into stow position. A slight
hammer strike may be necessary to remove pins.
Always use proper eye protection during this step.
Utilization of the jib jack at this time will aid in pin hole
alignment to facilitate pin removal.
9. Using lift function, raise boom to a horizontal position.
10. Using extend function, extend boom approximately 1
foot.
11. Using tag line attached to jib sheave case, slowly swing
jib into stow position (parallel with 1
st
section boom).
Pins C1 are the jib pivot points during this operation.
12. Install jib swing pin B with spring clip through jib ear and
boom sheave case holes. This pin will keep the jib
assembly in line (parallel) with the 1
st
section boom. Pin
B does not retain the jib in its stowed position on the 1
st
section boom.
13. Using boom telescope function, slowly retract boom.
The ramp/side stow bracket assembly on the side of the
1
st
section jib will engage the hook on the side of the 1
st
section boom, first lifting the jib and then engaging the jib
side stow bracket and the boom hook completely upon
full retraction of the boom.
14. Install stow pin A with spring clip into the ramp/side stow
bracket assembly on the jib. Complete engagement of
stow brackets and proper installation of pin A is critical
for a secure jib stow attachment.
15. Remove pins C1 from upper and lower jib ears. A slight
hammer strike may be necessary to remove pins.
Always use proper eye protection during this step.
16. Reinstall loadline over boom sheave case.
Jib Maintenance
1. Lubricate sheave pin on jib with grease gun containing
chassis grease weekly.
2. Check for free rotation of jib sheave daily when using jib.
3. Lubricate jib sheave case pivot pin with grease gun
containing chassis grease monthly.
Jib Removal
Should jib removal from the boom become necessary,
proceed as follows
1. Unstow and swing jib into position on the boom tip
according to Steps 1 - 10 in the preceding jib deployment
section.
2. Support and raise the jib at its balance point and remove
the two swing around pins. Jib is now free of boom.
3. To install, proceed in reverse order of removal.
CAUTION
Use caution when swinging jib to avoid unnecessary
impact with 1st section boom
DANGER
Visually check all pin positions to assure Jib is fully
retracted into side stow brackets, jib stow attachments
secure, and all pins and spring clips are in their proper
locations. Failure to properly secure the jib during stowing
and erecting may allow the jib to fall. Serious personal
injury or death could result.
WARNING
Always have at least one, if not both of the following in
place at all times:
• Side stow bracket completely engaged into stow
hook with stow pin A properly in place.
• Both pins C1 in upper and lower jib holes properly in
place through mating holes on boom tip
CAUTION
Jib Weights
The 41 ft (12.49 m) jib weights 960 lbs (435 kg) at 129 in.
(328 cm) when retracted from mounting pin holes.
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